New Curculionidae (Col.) from New Zealand.
[Communicated to the Wellington Philosophical Society, November, 1937; received by the Editor, June 6, 1937; issued separately, December, 1937.]
Among the insects received for identification during recent years from various correspondents in New Zealand, and especially Messrs. G. V. Hudson and A. E. Brookes, a good many weevils new to science have been found, and these are described in the following pages. In all cases the types have been deposited in the British Museum.
Platyomida agrestis, sp.n.
♂ ♀. Piceous black, with dense coppery brown scaling; pro-thorax with a very indefinite paler lateral stripe on the basal half; elytra with a common indefinite transverse grey band across the summit of the declivity, terminating laterally at stria 5 or 7.
Head with the forehead depressed below the level of the rostrum, flat, without any median fovea. Rostrum stout, shorter than the pronotum (5:7), parallel-sided from the base to the antennae and only slightly dilated at the genae; the dorsal area convex both longitudinally and transversely, with a strong median carina, which does not extend to the forehead, but without lateral carinae, the sculpture hidden by scaling; the scrobes largely visible from above, widening behind and nearly reaching the eyes. Antennae with the scape gradually clavate, the distal joints of the funicle elongate and clavate. Prothorax as long as broad, with the sides strongly rounded in the anterior half, much narrowed behind and almost parallel-sided close to the base, not constricted apically, truncate at base and apex, which are almost of equal width; the dorsum slightly convex longitudinally, rugose, with scattered low granules sometimes showing through the scaling and with a large ovate median depression near the apex, but none at the base; the long broad scale-like setae recumbent on the disk, but erect along the apical margin. Scutellum triangular. Elytra broadly ovate, slightly narrower in ♂, jointly rounded and not produced at the apex, the humeral angle very obtusely rounded and without any tubercle; the shallow discal striae regular and containing distant punctures; intervals 3 and 5 with rows of low tubercles, those at the top of the declivity being somewhat larger than the others, and that at the base of 3 conspicuous and elongate, no tubercles on 3 behind the large one at the top of the declivity; interval 7 costate, the costa being usually interrupted to form low tubercles in the apical half; the suture obtusely elevated on the declivity, no elevation at the apical junction of intervals 9 and 3. Legs with the front tibiae inconspicuously denticulate and rather markedly curved inwards at one-third from the apex.
Length, 6.5–7.1 mm.; breadth, 2.8–3.5 mm.
North Island: Mataraua, Kaikohe, Bay of Islands, 2 ♂ ♂, 2 ♀ ♀, iii, 1929 (E. Fairburn).
Closely resembling P. hystricula, Broun, which differs however in the following respects:—The rostrum is narrower, almost flat dorsally, with a much less distinct carina, and the scrobes are parallel-sided; the scape is more abruptly clavate, and the distal joints of the funicle are much shorter and moniliform; the prothorax is shorter, a little broader than long, constricted at the apex, with three subequal foveae near the apical margin; on the elytra striae 5 and 6 are sinuous so that interval 6 is much narrowed near the base, interval 3 has two additional tubercles on the declivity and the basal elevation is almost obsolete, and the suture is not raised on the declivity.
The specimens were kindly submitted by Mr. A. E. Brookes.
Genus Homodus, Broun.
The characters given by Broun for separating this genus from Hygrochus, Broun, are not reliable, but the genera can be distinguished by the form of the corbels of the hind tibiae, which in Hygrochus are quite open and in Homodus broadly enclosed. As a result of utilising this character Homodus cuprealis and obscurus, Broun, will have to be transferred to Hygrochus.
Brachyolus scutellatus, sp.n.
♂ ♀. Piceous brown, with dense mingled grey and brown scales; an indefinite whitish patch on the rostrum between the antennae, a whitish patch in the basal angles of the prothorax and extending to the margin of the elytra, and the scutellum conspicuously white.
Head sloping steeply in front and separated from the rostrum by a rather deep depression, the forehead very nearly as broad as the base of the rostrum. Rostrum very short and stout, only slightly longer than broad, the apical declivity about as long as the basal part, less dilated at the apex than usual; the dorsum, rather strongly convex longitudinally, the basal half without any definite carinae, the sculpture being hidden by dense scaling, and set with stout erect brown setae; the upper edge of the scrobes strongly curved. Antennae testaceous brown, short and stout, the distal joints of the funicle transverse. Prothorax nearly as long as broad, strongly rounded at the sides anteriorly, rather abruptly narrowed at the base, which is as broad as the apex, the postocular lobes feeble; the dorsum uneven, with shallow indefinite foveae covered with scaling and a low curved sublateral costa on each side, the higher portions set with short suberect peg-like brown setae, and some curved spatulate white ones laterally. Scutellum almost semicircular, with dense white scaling. Elytra very similar to those of asperatus, Broun, but the sides less oblique at the base and the apex not so much produced; the punctate striae almost obliterated by the dense scaling, interval 3 with a broad elevation at the base (but not projecting over the base of the prothorax as in huttoni, Sharp), a smaller elevation on interval 5 before the middle, and the usual prominences on 3 and 5 at the top of the declivity forming a straight transverse row, those on 5 being larger than those on 3, whereas in most other species those on 3 are much the larger and placed further back; a
low elevation near the apex of 7, and the suture slightly raised on the upper half of the declivity; all the intervals with a row of suberect spatulate brown setae (more or less duplicated on 3 and 5), and on all the elevations except the basal one a group of white spatulate setae. Legs with dense brown or grey scaling, the tarsi testaceous, the tibiae with a broad blackish band on the apical half.
Length, 3.5–4.0 mm.; breadth, 1.6–1.9 mm.
North Island: Utiku, Main Trunk, 2 ♂ ♂, 2 ♀ ♀, vi, 1917 (J. Ford).
The short arched non-carinate rostrum and the short stout antennae, combined with the conspicuous white scutellum, will serve to distinguish this species from its allies.
Zenographus garviensis sp.n.
♀. Black, with dense grey and brown scales which entirely conceal the integument, the brown scales with a coppery reflection; head and rostrum grey, the vertex with two elongate brown patches; the prothorax grey with the following brown markings: a median stripe (enclosing a short grey stripe beyond the middle), a large oblong sublateral basal patch, a short oblique stripe on each side of the apex, and some indefinite brown markings across the middle; scutellum pale green; elytra grey, with variable brown spots along the striae.
Head with very short sparse recumbent brown setae and a small oval median fovea. Rostrum comparatively stout, the dorsal area broad, almost flat, densely squamose, with a narrow bare median carina; the interantennal area with sparse narrow bright green scales. Antennae stout, the scape with sparse grey pubescence; funicle with joint 1 as long as 2 + 3, 3–6 subequal, transverse and moniliform, 7 broader. Prothorax nearly as long as broad, rounded laterally, widest beyond the middle, subtruncate at the base, with the post-ocular lobes almost obsolete; the dorsum slightly convex longitudinally, uneven, with a complete median sulcus, an irregular impression on each side of the disk behind the middle, an oblique impression on each side at the apex, and some very irregular low elevation across the middle. Scutellum comparatively large, tri-angular, with dense elongate pale green scales. Elytra broadly ovate, jointly sinuate at the base, with the basal angles projecting obtusely forwards; the striae containing comparatively small punctures which are full of scaling; intervals 3, 5, 7 raised into broad obtuse costae; 2, 4 and 6 almost equally broad (at least in the middle), comparatively regular and flat; scales of the mosaic type, the inconspicuous setae very short, dark and closely recumbent. Legs with dense grey scales and a few green ones, without any definite paler band on the femora.
Length, 9.5 mm.; breadth, 4.5 mm.
South Island: Garvie Mountains, Lake, 1 ♀, xii, 1920.
Received from Dr. D. Miller, Cawthron Institute.
The two previously described species of the genus, metallescens and albonotatus, Broun, differ in having the costae on the elytra narrower and the punctures in the striae much larger, so that intervals 2, 4, 6 are narrow and very irregular. Z. metallescens, which is the more nearly allied to the new species, also has the rostrum much narrower, and the setae all over the upper surface are longer, pale and conspicuous.
Inophloeus piger, sp.n.
♀ . Derm dull black, thinly clothed with fuscous and grey scales; underside with sparse greenish scales.
Head with rather close shallow punctures, each covered with a scale; the forehead flattened in the middle, with a median fovea and without erect setae. Rostrum stout; shorter than the pronotum (7:8.5), widening from base to apex, the lower surface curved in lateral view; the dorsum with longitudinally confluent punctures (hidden by scaling) and a strong median carina, the lateral margins rounded off; the interantennal area very short and not impressed, the epistome unusually large, gently convex, smooth, with small shallow separated punctures, its margin not carinate but defined by a deep sulcus, its posterior angle extending as far as a line drawn between the antennae, the apical margin asymmetrically sinuate in the middle; the scrobes longer and more sharply defined than usual, extending for three-fourths the distance between antenna and eye. Antennae red-brown, with the club fuscous; the scape short, not quite reaching the hind margin of the eye, strongly and abruptly clavate, with sparse narrow pale scales; the funicle somewhat longer than the scape, joint 1 much longer than 2, 3–6 equal, bead-like and a little longer than broad, 7 shorter, as long as broad. Prothorax transverse, rounded laterally, broadest beyond the middle, with the postocular lobes feeble; the dorsum with shallow rugose punctation, which becomes much deeper and more rugose laterally, with a short median stria on the apical half; the setae minute and recumbent. Elytra broadly ovate, parallel-sided in the middle, without any tubercles or apical processes; the striae with rounded punctures, each containing a minute seta and separated by not less than their own diameters, stria 1 not curving outwards at the base; the alternate intervals a little more convex, the setae short and recumbent. Legs black, with greenish and grey scales, the tarsal claws red-brown; all the tibiae finely denticulate on the lower edge.
Length, 10 mm.; breadth, 4.4 mm.
South Island: Mount Arthur, 4500 ft., 1 ♀, in spear-grass, i, 1932 (G. V. Hudson).
The form of the epistome is unusual in this genus. The species that most nearly resembles I. piger is I. obsoletus, Broun, which however has a smaller, rugosely punctate and ill-defined epistome; the pronotum has no anterior median stria and is obtusely elevated in the middle of the base; the first joint of the funicle is slightly longer than the second; and the elytra bear low tubercles at the top of the declivity on intervals 3 and 5, and the apex in the female is produced downwards like a beak.
Lyperopais stellae, sp.n.
♀ . Rather dull black, with very sparse inconspicuous grey scales, forming broad indefinite lateral stripes on the pronotum, those on the elytra and legs often with a pale green reflection; the venter quite bare, and the other scales are sometimes entirely abraded.
Head with close shallow punctures, each of which normally contains a dark scale, the forehead with a large median fovea. Rostrum rather stout, a little shorter than the pronotum, parallel-sided except for a shallow constriction at the base; the dorsum very strongly curved downwards in the apical half, which is flat transversely and entirely impunctate; the basal half of the dorsum with very shallow close punctation, narrow between the antennae, being there only as wide as the antennal club, rapidly widening to near the base, then narrowing again, costate in the middle and with a shallow longitudinal impression on each side; the whole of the lower surface below the scrobes glabrous and with sparse microscopic punctures. Antennae black or blackish, the scape strongly curved and clavate; joint 2 of the funicle slightly longer than 1, the rest oval, becoming gradually shorter distally. Prothorax a little broader than long, strongly rounded laterally, widest beyond the middle, shallowly constricted at the apex, without any postocular lobes; the dorsum convex longitudinally, highest behind the middle, with small shallow separated punctures on the disk, which become larger and denser laterally, each containing normally a scale or flattened seta, and with a very shallow median stria containing a double row of punctures. Scutellum small, triangular. Elytra 2–2.5 times as long as broad, feebly sinuate laterally behind the obliquely rounded shoulders, with the sides very slightly rounded, widest at the middle, strongly compressed laterally at the apex, so that interval 7 forms a costate margin to the dorsum in the apical half or two-thirds; the very shallow striae containing distant oblong punctures, which are separated by about their own length and become much smaller behind; the intervals coriaceous, 3, 5, 7 slightly costate, but 3 flatter in the middle of the disk; the apices separately rounded, the lateral margins of the apex narrowly explanate. Legs entirely black, with sparse scaling; the hind femora with a subapical tooth such as is only found in the males of the other two species, but rather smaller and sharper, the hind tibiae with a corresponding deep semicircular basal excision terminating in a sharp angle; the front tibiae with the dorsal edge straight and not curved inwards at the apex. Venter bare and impunctate, the two basal ventrites dull and finely aciculate, the others very shiny.
Length, 8.5–9.0 mm.; breadth, 3.5 mm.
South Island: McKinnon Pass, Milford Track, 1♀, xi, 1927 (Miss E. Richardson); Arthur's Pass, 4500 ft., 2 ♀ ♀, 1, 1933 (Miss Stella Hudson—type), 1 ♀, i, 1928 (A. Philpott).
From the females of the two previously described species, L. mirus and alternans, Broun, this insect may be readily recognised by the tooth on the hind femora and the basal excision on the hind tibiae, as well as by the entirely impunctate and very shiny apical ventrites.
Megacolabus fulviceps, sp.n.
♂. Dull black; forehead and basal half of rostrum with dense fulvous scales; pronotum almost bare; elytra with small scattered spots of sparse fulvous and whitish scales, the latter forming denser spots on intervals 3 and 7 at one-fourth from the base, a short humeral fulvous stripe, and a common narrow sinuous transverse line of whitish scales across the top of the declivity as far as interval 5, forming almost a semicircle.
Head with the sculpture normally hidden by dense scaling, with a shallow frontal fovea and a slight elevation on each side of it. Rostrum as long as the pronotum, rather strongly curved, rapidly narrowing from the base to beyond the middle, rather abruptly widened at the antennae and parallel-sided from there to the apex; the dorsum strongly convex transversely, with three low narrow carinae, the apical area with close rugulose punctation. Antennae inserted at one-third from the apex of the rostrum, elongate, red-brown; scape slender, abruptly clavate; funicle with joint 2 much longer than 1 (1.5 times), 4–6 subequal, moniliform and about as long as broad, 7 slightly longer and wider. Prothorax as long as broad, very gradually widening from the base to beyond the middle and there gently rounded laterally, the apical margin arcuate and feebly sinuate in the middle, the postocular lobes strongly developed; the dorsum almost flat longitudinally, with sparse, shallow and unevenly distributed punctures, the intervals with scattered depressed shiny granules, which replace the punctures near the apical margin and form just beyond the middle a transverse row of four slightly raised aggregations, and two similar aggregations behind the median pair; the scales minute and extremely sparse. Elytra obovate, jointly sinuate at the base and there broadly constricted laterally, then rounded at the sides and widest far behind the middle; the dorsal outline rising rapidly for a short distance at the base, then more gradually to beyond the middle, the declivity abrupt and almost perpendicular just behind the transverse pale band; the rows of large remote punctures rather irregular and not striate; the intervals with fairly numerous irregular small shiny granules, interval 3 with five small granulate elevations and interval 5 with three; the scales very small and setiform. Legs stout, with dense patches of ivorywhite and fulvous scales; femora with a very broad sub-apical white band, which on the posterior pairs is interrupted by a large bare black dorsal patch, and a narrower sub-basal white band on the posterior pairs; tibiae with dense fulvous scaling and a median and sub-basal white band, the front pair distinctly bisinuate on the inner edge.
Length, 5.5–6.0 mm.; breadth, 2.7–3.0 mm.
North Island: Dawson Falls, Mount Egmont, Taranaki, 2 ♂ ♂, i, 1932 (E. Fairburn).
Forwarded by Mr. A. E. Brookes.
Megacolabus decipiens, sp.n.
♂ ♀. Extremely similar to the preceding species, but differing as follows:—
The fulvous scales on the head and rostrum very sparse, except on the cephalic elevations, the scales themselves twice as large as those of M. fulviceps; pronotum with sparse fulvous scales like those on the head, except in the middle of the disk; elytra without any spots of ivory white scales.
Rostrum longer that the pronotum, the lateral carinae less distinct, the apical area gradually widening to apex. Antennae with the two basal joints of the funicle equal, the distal joints longer than broad. Prothorax slightly transverse, parallel-sided in the basal half; the granules on the disk much less numerous and almost confined to the elevations, the two median elevations rather more prominent. Elytra with fewer granules; intervals 4, 6, 7 also bearing low elevations, and interval 3 with an additional elevation on the declivity. Legs much more slender, with sparse fulvous scales, the posterior pairs of femora with only a narrow submedian band of ivorywhite scales and a few similar scales near the base; the front tibiae not bisinuate internally.
Length, 5.2–6.8 mm.; breadth, 2.6–3.5 mm.
North Island: Dawson Falls, Mount Egmont, Taranaki, 2 ♂ ♂, 2 ♀ ♀, i, 1932 (E.Fairburn).
Forwarded by Mr. A. E. Brookes.
Megacolabus reductus, sp.n.
♀. Dull black, the upper surface with only a very few sparse minute pale scales, apart from a large fulvous humeral patch on the elytra and a narrow transverse band of whitish scales across the top of the declivity that is not sinuous.
Head with rugose confluent punctures and longitudinal carinu-lae, without elevations and with a deep median fovea. Rostrum as long as the head and pronotum, curved, rapidly narrowing from the base to one-third, then gradually widening to the antennae, the apical portion still wider and parallel-sided; the dorsum with rugose shallow punctation and a low median carina on the basal half, the apical area with sparse shallow punctures and a shallow longitudinal sulcus on each side. Antennae with joints 2 of the funicle slightly shorter than 1, the distal joints transverse. Prothorax somewhat transverse, moderately rounded laterally, widest beyond the middle, the apical margin shallowly sinuate in the middle; the dorsum with more numerous punctures and granules than in the two preceding species, the transverse row of four granular elevations feebly developed, the posterior ones absent. Elytra similar to those of the preceding species but without definite elevations, interval 3 slightly raised from the base to the declivity and with an irregular row of granules, 5 without any basal elevation and the granules arranged in groups. Legs black, tarsi red-brown, with sparse pale setae and scattered shiny granules; the posterior pairs of femora with a band of whitish scales; the tibiae slender, the front pair straight internally.
Length, 4.0–4.5 mm.; breadth, 1.8–2.0 mm.
North Island: Mataraua, Kaikohe, Bay of Islands, 2 ♀ ♀, iii, 1929 (E.Fairburn).
Forwarded by Mr. A. E. Brookes.
Its small size and non-tuberculate elytra will distinguish this species from the two preceding ones.
Only one species of this genus has been described previously, namely, M. sculpturatus, Broun 1893, which was based on a single female. It differs from the three new species as follows: The head is much broader; the rostrum is not dilated at the apex; the antennae are inserted further back on the rostrum (two-fifths from the apex), being much shorter and thicker, with the scape gradually clavate and the two basal joints of the funicle equal; the pronotum is distinctly transverse, closely and coarsely punctate, strongly rounded laterally, widest at the middle, and with feeble postocular lobes; the elytra are much less constricted at the base, widest at about the middle, less abruptly declivous behind, somewhat uneven dorsally, with numerous irregular granules, but without definite rows of elevations; the tibiae with dense uniform grey scaling, etc.
Broun placed his genus with considerable doubt in the Erirrhininae, but it clearly belongs to Rhyparosominae.
Astyplus incisicollis, sp.n.
♂. Dull black, with small recumbent brown scales and much longer ones forming dense erect tufts and ridges.
Head narrow, with the eyes quite flat and lateral, and with a small tuft in the middle of the forehead. Rostrum shorter than the pronotum (7.5: 9), curved, gradually widening from base to apex; the dorsal area narrow in the basal half, so that the scrobes are visible from above for more than half their length; the apical half bare, closely and coarsely punctate, with a low median carina; the basal half squamose, with a small dorsal tuft of erect scales not far from the base and an elongate tuft on each side of it projecting laterally. Antennae with joint 1 of the funicle much longer than 2, 7 about as long as broad. Prothorax longer than broad, subconical, almost flat above right up to the dorso-lateral margins, which are sharply angulate, the pleurae being abruptly and vertically declivous; the dorsum widest near the base, narrowing in front to two-thirds of the length, where the dorsal margins are deeply constricted, the constriction continued on the disk but divided in the middle by a low carina; the dorsum with coarse subreticulate punctation and a large deep semicircular impression in the middle of the base; the apical area with a large tubercle on each side bearing a dense tuft of erect spatulate brown setae and separated by a deep median impression, the apical margin sinuate in the middle. Elytra as wide at the base as the prothorax and widening posteriorly for three-fourths the length, flattened dorsally as far as interval 5 and for two-thirds the length, with a large postscutellar impression extending to stria 2; two regular rows of large deep punctures adjoining the suture and two on the lateral margin, the others more or less confused; the following elevations covered with erect spatulate scales: a short humeral ridge, a longer posterior carina on interval 5 begin-
ning behind the middle and ending as a high obtusely angulate ridge at the side of the posterior declivity, a short costa at the base of interval 3, a low tubercle at one-third from the base of 4, a tubercle at the middle of 6 and another behind, one on 7 between these latter, a transverse row of tufts at the top of the declivity on intervals 1–4, and a tubercle near the apex on 3.
Length, 8 mm.; breadth, 3.5 mm.
South Island: Flora River, Mount Arthur, 2800 ft., 1 ♂, i, 1932 (G. V. Hudson).
Differs from the two previously described species, A. conicus, Broun 1893, and A. brevicornis, Broun 1921, in the lateral and median incisions at the apex of the pronotum. The male of conicus closely resembles it in general facies, but the rostrum is more dilated at its apex, the funicle is more slender, with joint 7 much longer than broad, and the erect scales on the body are longer.
Of the genera included in this group by Broun several really belong to other subfamilies. Only five indigenous genera can be retained in it, all of which are peculiar to New Zealand, and they may be distinguished by means of the following key.
(2). Width of forehead much less than the length of an eye; rostrum with a broad median furrow beneath. Anagotus, Sharp.
(1). Width of forehead equal to or greater than the length of an eye; rostrum without a median furrow beneath.
(6). Interval 6 on elytra costate, interval 7 flat, stria 5 curving outwards basally so that 6 does not reach the base.
(5). Prothorax with strong postocular lobes; scrobes continued broadly and distinctly on the lower surface of the rostrum to the base. Phaeophanus, Broun.
(4). Prothorax with the postocular lobes obsolete; scrobes not extending to the lower surface of the rostrum. Phoxoteles, Broun.
(3). Interval 6 on elytra flat, interval 7 costate, stria 5 not curving outwards basally, stria 6 reaching the base.
(8). Metasternum between the coxae shorter than a median coxa; ventrite 1 behind the coxae shorter than 2; apex of elytra rounded. Phaedropholus, Broun.
(7). Metasternum between the coxae as long as a median coxa; ventrite 1 behind the coxae as long as 2; apex of elytra with a small angular emargination Pparchus, Broun (=Mecosargon, Broun).
I can find no character by which to separate Mecosargon from Pparchus and am satisfied that they are congeneric.
It may be noted that Phaeophanus fairburni, Brookes, has no postocular lobes on the prothorax and must be transferred to the genus Phoxoteles.
Of the other genera, Hadramphus, Broun, is a Hylobiine; Sargon, Broun, has well marked scars on the mandibles and is an Otiorrhynchine allied to Getopsephus, Broun; Saphorrhynchus, Sharp (= Hetero-styles, Broun) belongs to the Aterpinae; and Lyperopais, Broun, to the Tanyrrhynchinae.
Phoxoteles peelensis, sp.n.
♀ . Derm dull black, with sparse minute brownish and grey scales.
Head with the eyes absolutely flat and very narow, the longer axis being more than twice as long as the shorter (8:3). Rostrum shorter than the pronotum, with the dorsal outline straight from the base to two-thirds and then abruptly declivous, with very shallow coarse confluent punctation; the lateral margins of the dorsal area strongly costate, especially in front, and enclosing a broad sulcus which becomes very deep anteriorly and contains a fine low carina. Prothorax as long as broad, parallel-sided in the basal fourth, then strongly rounded, being widest at two-thirds from the base, without any apical constriction; the dorsum shallowly rugose, with sparse small low shiny granules on the intervals, a shallow transverse sub-lunate impression on the disk beyond the middle and an elongate granulate elevation on each side of it, a low elevation in the middle of the anterior margin, and a shallow impression in the middle of the base; the front margin of the prosternum deeply sinuate. Elytra oblong-elliptical, trisinuate at the base, jointly rounded at the apex; the shallow striae containing large deep rounded punctures, which are separated by about their own length and often have a flattened shiny granule on the anterior edge, stria 5 curving outwards basally so that stria 6 does not nearly reach the base; the intervals with irregular low shiny granules, each bearing a small narrow ovate scale, interval 3 with a large obtuse tubercle at the summit of the declivity, 5 and 6 with a row of smaller granulate tubercles; the general scaling sparse, the scales being much smaller than those on the granules, isolated and with a coppery reflection. Legs with fairly dense scaling, with numerous bare black spots occupied by small flattened shiny granules; the apical fringe on the tibiae black; the tarsi with a lateral fringe of long stout setae, mostly curved at the tip on joints 2 and 3.
Length, 12.0–14.5 mm.; breadth, 5.0–6.5 mm.
South Island: Mount Peel, Nelson, 5000 ft., 5 ♀ ♀, 15.ii.1931, 4,800 ft., 3 ♀ ♀, 31.i.1932 (E. S. Gourlay).
Received through Mr. A. E. Brookes.
Allied to P. graniger, Broun, which differs in having the prothorax angulate laterally and constricted at the apex; the dorsal outline of the rostrum is not angulate, the elytra are densely squamose, and the apical fringe on the tibiae is reddish.
Hyperodes griseus, Hust. 1927.
For some years I have had by me a specimen of this small species (3 mm. long) taken by Dr. D. Miller at Nelson in 1927, and another taken by Mr. G. V. Hudson at Paekakariki in October, 1928, and was unable to place it in any New Zealand genus. More recently Mr. Hudson has found a specimen on the hills south of Wellington in April, 1935, and Mr. J. Muggeridge has sent me a series of specimens found in turf at Springfield in December, 1933, by Mr. W. Cottier, and I then identified it as an Argentine species, Hyperodes griseus. Mr. Hustache has now very kindly presented me with a cotype of his species, which places the identity of the insect beyond doubt.
It is evident that this weevil has now thoroughly established itself in the Dominion, and it is possible that it may later develop into a pest.
Bryocatus scapularis, sp.n. (fig. 1).
♂. Red-brown, with dense sand-coloured indumentum-like scaling; the apex of the rostrum and a large longitudinal patch on each side of the base of the pronotum bare and red-brown.
Head densely squamose, the forehead flat, its width equal to the length of an eye. Rostrum about as long as the pronotum, gently curved, cylindrical from the base to the antennae, a little wider but still parallel-sided in the apical part, which is finely aciculate and with four rows of punctures; the posterior part densely squamose and with a few stout recumbent setae. Prothorax longer than broad, only slightly rounded laterally, widest beyond the middle, very shallowly constricted near the apex, gently arcuate at the base, with the basal angles right angles; the dorsum slightly convex longitudinally, smooth, the very shallow punctures concealed by scaling, with a few large curved subrecumbent brown setae. Elytra nearly as broad as long (9.5:11), jointly sinuate at the base, widest at the obtusely prominent shoulders, which project laterally, almost parallel-sided from behind these to beyond the middle, and jointly rounded at the apex; the striae, which appear to be very fine and shallow through the scaling, very irregularly sinuous and without visible punctures; the intervals also irregular in width and very uneven, interval 3 with three elevations: a low one near the base, another just before the middle, and the largest at the top of the declivity; interval 5 with a large elevation before the middle and another behind it, the suture slightly raised on the declivity; intervals 1, 3, 5, 7 only with a sparse row of very large conspicuous recumbent brown setae, there being several together on each elevation. Legs with dense pale scaling, the femora being red-brown, the tibiae much paler, and the tarsi dark piceous brown.
Length, 2.4 mm.; breadth, 1.2 mm.
North Island: Waimarino, 1 ♂, i, 1922 (G. V. Hudson).
Allied to B. amplus, Broun, which is a larger insect and differs as follows: the width of the forehead is greater than the length of an eye; the prothorax is as broad as long, with the sides strongly rounded and the basal angles obtuse angles; the elytra have less prominent elevations, the shoulders do not project laterally, and the setae are very small and inconspicuous.
Praolepra uniformis, sp.n.
♂. Uniform testaceous, rather thinly clothed with small separated whitish scales.
Rostrum nearly twice as long as the head and prothorax (11:6.5), curved, cylindrical, only slightly dilated at the apex, smooth, bare (except for a few scales at the extreme base), and with
four rows of minute shallow punctures. Prothorax transverse, slightly rounded laterally, widest beyond the middle, rather broadly constricted at the apex, closely punctate, without any smooth median line; the scales very sparse on the disk, denser laterally, and in the basal angles a few elevated scales. Scutellum convex, dark brown, bare. Elytra oblong-ovate, with the dorsal outline gently convex and highest at about the middle, with a shallow transverse impression on the basal fourth and obtuse posterior calli; the striae slightly sinuous in parts, containing strong close punctures which scarcely diminsh behind; the intervals broader than the striae, impunctate, with sparse suberect scale-like white setae, especially on the apical half, these setae forming a small tuft on the posterior calli. Legs with very sparse narrow whitish scales, the femora with a small tooth, the tibiae with a minute apical mucro.
Length, 3 mm.; breadth, 1.3 mm.
North Island: Wilton's Bush, 2 ♀ ♀, xi, 1931 (G. V. Hudson).
Most nearly allied to P. fusconotata, Broun, which however is clothed entirely with fine setiform brassy scales and has no erect setae, and the prothorax and elytra bear indefinite brown spots.
In a recent paper (Arb. morph. tax. Ent., iv, 1937, p. 42) Mr. E. Voss has suggested that the genera allied to Eugnomus and Stephano-rrhynchus should be associated in a new subfamily, a proposal with which I agree, although the essential character suggested, namely, the flexibility of the maxillary palpi is not always sufficiently obvious to distinguish them with certainty. Like many such residual primitive characters, these palpi vary considerably in length and structure, especially in the genus Eugnomus (in the sense of Pascoe and Broun), as Voss has himself pointed out; while in Pactola their length is reduced almost to the normal Curculionid type, although some measure of flexibility still remains. Again, although the palpi are very conspicuous when exserted, in many cases they are not easily visible in a position of rest, because they are curved round in front of the labial palpi beneath the mandibles and cannot be seen properly with dissection; but in conjunction with the following combination of characters a satisfactorily homogeneous association of genera may be formed:—
Head elongate, with the temples as long as or longer than the eyes; scrobes oblique, turning rapidly downwards and continued on the lower surface of the rostrum (the only exception to the latter character being Eugnomus bryobius, Broun); scape always far exceeding the front margin of the eye; front coxae conical, hind femora bearing a large tooth (with only a few exceptions), tibiae always without any trace of a mucro, tarsal claws appendiculate or divaricate with an obtuse setigerous tooth at the base.
As thus defined, the subfamily will include the 15 New Zealand genera contained in the following key:—
(2). Front coxae separated; mesosternal process somewhat broader than long, shallowly excavated for the reception of the rostrum; front margin of prothorax produced into two stout horizontal spines. Gonoropterus, Broun.
(1). Front coxae contiguous, mesosternal process longer than broad, not excavated; front margin of prothorax simple.
(28). Head not constricted near the base.
(5). Scrobes uniting in a broad furrow on lower surface of head; scape far exceeding hind margin of eye; dorsal spines on elytra mainly on interval 7; funicle with six joints; shoulders of elytra obtusely rounded; claws strongly appendiculate. Nyxetes, Pasc.
(4). Scrobes not uniting beneath; scape not exceeding hind margin of eye; dorsal spines on elytra (when present) only on interval 2 or 3.
(25). Metasternum longer than ventrite 1 behind the coxae; elytra with a distinct humeral prominence.
(10). Eyes not projecting laterally beyond the outline of the temples.
(9). Head (with eyes) only slightly broader than base of rostrum; metepisterna in the middle about as broad as the adjoining epipleural margin of elytra; stria 6 on elytra not reaching base. Scolopterus, Wht.
(8). Head (with eyes) nearly twice as broad as base of rostrum; metepisterna twice as broad as the epipleural margin; stria 6 reaching base. Icmalius, Broun.
(7). Eyes distinctly convex.
(14). Elytra bearing two or four large sharp conical spines and the shoulders laterally produced into a sharp angle or spine.
(13). Front femora with a tooth; hind tibiae quite straight; ventrite 2 much shorter than 3 + 4; claws divaricate, with a small obtuse tooth at base. Ancistropterus, Wht.
(12). Front femora without any tooth; hind tibiae strongly curved; ventrite 2 as long as 3 + 4; claws strongly appendiculate. Amylopterus, Broun.
(11). Elytra without spines, shoulders not sharply angulate.
(24). Rostrum much longer than head; hind tibiae not curved or compressed; tarsal claws divaricate, with a very small obtuse setigerous tooth at base.
(23). Funicle with seven joints; the tooth on hind femora without a notch at its base.
(18). Mesosternal process broadly truncate, its apex much broader than the base of a middle femur; hind femora with only a small inconspicuous tooth; scrobes short, lateral, not passing beneath rostrum; sides of buccal cavity almost parallel; tergite 8 of ♀ obtusely pointed, tergite 8 of ♂ simple. Goneumus, g.n.
(17). Mesosternal process acuminate or narrowly truncate, narrower than base of femur; hind femora with a distinct triangular tooth (except Eugnomus femoralis, Broun); scrobes continued beneath rostrum.
(20). Ventrite 1 behind the coxae shorter than 2; sides of buccal cavity diverging widely from base to apex; tergite 8 of ♀ sharply bifurcate at apex; tergite 8 of ♂ more or less excavated. Aneugnomus, g.n.
(19). Ventrite 1 behind the coxae as long as 2; sides of buccal cavity almost parallel; tergite 8 of ♂ simple.
(22). Head without tubercles; joint 1 of hind tarsi much shorter than 2 + 3; shoulders of elytra narrow and obliquely rounded, posterior calli absent; tergite 8 of ♀ either bifurcate or very sharply acuminate. Eugnomus, Schönh.
(21). Head bearing two conical tubercles; joint 1 of hind tarsi as long as 2 + 3; shoulders very broad and prominent, posterior calli strong; tergite 8 of ♀ broadly subtruncate at apex with a median emargination. Tysius, Pasc.
(16). Funicle with six joints; the large tooth on the hind femora with a deep notch at its base. Oreocharis, Broun.
(15). Rostrum not or but slightly longer than head; hind tibiae compressed and strongly curved; tarsal claws appendiculate. Pactola, Pasc.
(6). Metasternum much shorter than ventrite 1 behind the coxae; elytra without any humeral prominence.
(27). Funicle with seven joints; hind femora with a small or obsolescent tooth, hind tibiae similar to median pair, not curved. Stenopactola, Broun.
(26). Funicle with six joints; hind femora with a large triangular tooth, hind tibiae strongly curved. Pactolotypus, Broun.
(3). Head strongly constricted near its base; scape far exceeding hind margin of eye.
(30). Funicle with six joints; claws strongly appendiculate. Hoplooneme, Wht.
(29). Funicle with seven joints; claws with only an obtuse basal tooth. Stephanorrhynchus. Wht.
Of the other genera included in this group by Lacordaire and, later, Faust (Berl. Ent. Zeits., xxix, 1885, p. 119) only one is a native of New Zealand, namely, Oropterus, White. In this genus the maxillary palpi are not flexible, the temples are shorter than the eyes, the scrobes extend laterally right up to the eyes, the coxae are not conical, the tibiae are mucronate, and the femora not toothed; the genus must therefore be assigned to the Anthonominae.
Of the remaining genera, three are peculiar to Australia, namely, Meriphus, Er., Myossita, Pasc., and Orpha, Pasc. These certainly present a noticeable resemblance to the Eugnominae and have short exertible palpi, but some of their other buccal characters are strikingly different and abnormal. The mandibles appear to be inserted on the wrong sides of the mouth; in other words, there is a conspicuous tooth on the outer edge (and sometimes two, one below the other), whereas the inner edge of the mandible forms a convex curve, so that when the mandibles are closed the apices diverge; moreover the epistome is produced over the mandibles in a very unusual manner, often being sharply pointed at its apex. They differ also in having quite simple non-divaricate claws, and the tibiae are mucronate in the males but not in the females. These characters seem to justify their separation into a new subfamily—Meriphinae.
The Chilean Rhopalomerus, Blanch., is a true Eugnomine and very close to Aneugnomus; and Phrenozemia, Pasc., is an Erirrhinine.
The South American Hypselus, Schönh., and Ophthalmoborus, Schönh., are unknown to me; but the form of the scrobes appears to exclude them from the present subfamily, for they begin only at the middle of the rostrum and continue laterally up to the eyes; moreover in the former genus the tibiae have a long mucro.
It must be noted that the recently described New Zealand genus Pseudancistropterus, Voss 1936, is a synonym of Gonoropterus, Broun, and its genotype, P. horni, Voss, is synonymous with G. spinicollis, Broun. Further Stephanorrhynchus luctuosus, Voss 1936, is merely an aberration of S. attelaboides, F.; the long series that is available of this species shows it to be extremely variable in colour, and to a less extent in the relative development of the various tubercles.
The characters used above for separating Ancistropterus from Amylopterus will necessitate the transfer of Anc. pilosus, Broun, into the latter genus.
Genus Eugnomus Schönh.
When Schönherr defined his genus Eugnomus (Mant. sec. Curcul., 1847, p. 45) he cited as the genotype an undescribed species to which he gave the name durvillei. Later, Lacordaire (Gen. Colcopt., vi, 1863, p. 500) re-defined Schönherr's genus on the same species, which he described in a few words, so that it must be known as Eugnomus durvillei, Loc. Both Pascoe and Broun failed to
identify this insect, but thanks to Professor G. D. Hale Carpenter I have been able to examine one of the two specimens upon which Schönherr based his description of the genus, this being still in the Hope Collection at Oxford.
Unfortunately this insect proves to be identical with Caeno-phanus carbonarius, Broun, which again cannot be distinguished generically from Cyttalia, Pasc., being extremely close to the genotype, C. griseipila, Pasc., with which Pascoe actually confused it.
The outcome of this synonymy is that both the genera Cyttalia, Pasc., and Caenophanus, Broun, must fall as synonyms of Eugnomus, Schönh., and a new genus is required for the New Zealand species which at present stand under Eugnomus.
Genus Aneugnomus, nov.
The essential characters of this genus are set out in the foregoing key, and the genotype is Eugnomus fervidus, Pasc. 1876. It includes all the species listed under Eugnomus in Hudson's New Zealand Beetles (p. 219), except bryobius, Broun, which is transferred below to a new genus, and albisetosus, Broun, which is a true Eugnomus.
It may be noted that monachus, Broun, is only an extreme colour variation of interstitialis, Broun; and it has already been recorded that discolor, Broun, is a synonym of fucosus, Pasc., that tarsalis, Broun, is merely the male of aenescens, Broun, and that cyaneus, Broun, is only a colour variety of the same species.
Aneugnomus hudsoni, sp.n.
♀ . Rather dull bluish black, almost bare, the basal two-thirds of the scape, the tarsi and sometimes the knees red-brown.
Head with close strong punctures, the temples about as long as the eyes, which are moderately convex but do not project much beyond the sides of the head; the forehead almost flat and on a level with the upper edge of the eyes. Rostrum as long as the pronotum, subcylindrical from the base to the antennae, wider apically (6:5), coarsely and confluently punctate, with a narrow median carina which widens between the antennae and there bears a short stria, and a fine carina on each side of it, these converging towards the base; the apical area coarsely punctate except a smooth subtriangular patch at the apex. Antennae with the scape rather abruptly clavate, the club with the two basal joints together as long as the apical part. Prothorax as long as broad, subparallel-sided in the basal half, then roundly narrowed to the deep apical constriction, which is continued shallowly across the disk, the apical margin arcuate but not elevated; the dorsum somewhat convex longitudinally, highest behind the middle, with fairly close strong punctures leaving a very indefinite abbreviated smooth median line; the recumbent setae minute and inconspicuous, a few pale scales along the basal margin in the lateral angles. Scutellum triangular, punctate, bare. Elytra oblong-ovate, much wider than the prothorax at the roundly rectangular shoulders, without any definite dorsal impressions or any trace of posterior calli, separately rounded at the apex; the deep striae with strong
punctures, the broad intervals flat and finely aciculate. Legs without any tooth on the front femora, the middle pair with a moderate angular tooth, that on the hind pair forming a long sharp triangle with its posterior edge perpendicular to the femur.
Length, 6 mm.; breadth, 2.3 mm.
South Island: Mount Arthur, 4,500 ft., 2 ♀ ♀, on speargrass, i, 1925 (G. V. Hudson).
Belongs to the group of nobilis and aenescens, Broun. The latter differs inter alia in its concave forehead and very prominent eyes; the prothorax is transverse, with its apical margin truncate and elevated; and the elytra are finely rugulose, with indistinct striae.
Genus Goneumus, nov.
It has proved necessary to erect a new genus for the somewhat aberrant species, Eugnomus bryobius, Broun, the essential characters of which have been given in the key above. The scrobes are anteriorly similar to those of Eugnomus and Aneugnomus but soon gradually disappear and are not continued along the lower surface of the rostrum.
Oreocharis hebe, sp.n.
♂ ♀. Derm cinnamon-brown, the prothorax usually darker, the head, rostrum (except the apex) and sides of the metasternum blackish; pronotum devoid of scales except for a few whitish ones in the basal angles; elytra with very sparse, irregularly scattered, whitish scales, which are much more numerous on the three outer lateral intervals and form an abbreviated lateral stripe from the level of the hind coxae nearly to the apex; underside with much more numerous, but separated, whitish scales, which form a dense stripe on the side-pieces of the meso-and metasterna.
Head widening from the eyes to the prothorax, deeply and closely punctate; the vertex not flattened, with sparse minute recumbent golden setae, the temples shorter than the length of an eye; the forehead only slightly higher than the dorsal outline of the eyes, set with short erect black setae, not impressed and without a fovea; the underside with sparse whitish setae. Rostrum not quite as long as the head and pronotum, gradually narrowing from the base to the antennae, then widening again to the apex, with fine rugose punctation, without any carinae; the scrobes passing beneath the rostrum at one-third from its base. Antennae testaceous brown, with the club fuscous; the funicle with joint 1 as long as 2 + 3, 4 as long as broad, 5 and 6 slightly transverse, the two basal joints of the club as long as the remainder. Prothorax transverse (5:6), gently rounded at the sides, widest near the base, with the strong apical constriction continued shallowly across the dorsum, and the base arcuate; the dorsum feebly convex longitudinally, with close sub-confluent punctation throughout, and without impressions; the upper part of the pleurae with thin greyish scales and denser yellowish scales above the coxae; the dorsum with short subrecumbent golden setae. Scutellum suboblong, with dense pale scaling. Elytra 1.6 times as long as broad, parallel-sided from the roundly rectangular shoulders to beyond the middle, without any posterior calli; the
shallow striae containing close deep punctures, the septa between them being nearly as high as the intervals, which are almost flat, finely rugulose, with sparse golden pubescence and short erect black setae; the scales narrowly elongate. Legs concolorous, with sparse golden pubescence, and with scattered whitish scales on the femora only; the front femora without any tooth, the median pair with a small one, the tooth on the hind femora very long and sharp and with a deep excision at the base on its posterior edge; the hind tibiae shallowly sinuate dorsally, very deeply sinuate on the lower edge in the basal half, being more than twice as wide at the middle as at the base. Venter: last ventrite of ♂ convex and with short erect dark setae towards the apex, that of ♀ with a shallow median impresison and without erect setae.
Length, 3 0–3.5 mm.; breadth, 1.5 mm.
South Island: Cass, Mackenzie, 5 ♂ ♂, 2 ♀ ♀, bred from galls on Hebe Traversii, 1933 (L. Morrison).
Most nearly allied to O. picigularis, Broun, which is a narrower insect, having the head more elongate, the length of the temples being a little greater than that of the eyes; the prothorax is as long as broad, much less rounded laterally and truncate at the base; the elytra are twice as long as broad, with much less prominent shoulders and without the lateral stripe of white scales; the front femora bear a small tooth and the median pair a long sharp one.
Hoplocneme forcipata, sp.n.
♂ ♀ . Dull black with a dark purplish reflection; the apex of the rostrum and the legs testaceous brown with the femora and sometimes the tibiae more or less infuscated; the upper side with dark pubescence, except on the rostrum where it is yellowish; the underside with sparse pale pubescence, the prosternum and middle of the mesosternum with dense whitish scaling, the meso-and meta-sternum with a dense lateral stripe of simlar scales, which however does not cover the side-pieces, which bear only variable sparse whitish scales.
Head quadrate, coarsely punctate, the forehead narrow, about as wide as the space between the antennae. Antennae entirely blackish. Prothorax bell-shaped, nearly as long as broad, with the sides almost straight in the basal two-thirds, widest at the base and very gradually narrowing to the abrupt apical constriction, with coarse close punctures which are transversely subconfluent on the disk. Elytra elongate ovate, with well marked, strongly punctate-striae; the intervals rugulose, with fairly dense subrecumbent brown pubescence, which does not conceal the sculpture, and with a small patch of longer whitish setae at the apex. Abdomen of ♂ with a broad impression in the middle of ventrites 1 and 2; ventrite 5 (fig. 2) with a large setose prominence on each side, between which the apical half of the ventrite is deeply depressed with its hind margin bisinuate, and over the middle of the depression there projects a slightly curved sharp horizontal spine, which arises as a low median carina at the base of the ventrite and does not exceed its apical margin; the pygidium largely visible from beneath, its apical margin
roundly and very deeply excised so that the projecting lateral angles look like a pair of calipers, with the sharply pointed apex of the aedeagus lying between them.
Length, 3.0–3.5 mm.; breadth, 1.0–1.2 mm.
North Island: Wellington, 6 ♂ ♂, 3 ♀ ♀, xi, 1922 (G. V. Hudson—type); Ohakune, 1, x, 1919 (T. H. Harris).
The male of this species can readily be distinguished from all its congeners by the striking structure of the terminal segments of the abdomen; in several other species the anal ventrite is deeply sinuate in the middle and somewhat elevated laterally, but in none of these is the pygidium excised being simply subtruncate or arcuate at its apex. Further, this is the only species in which the setae on the intervals of the elytra are duplicated and irregular; in all the others, where present, they are in a single regular row. Again, the rather dense long yellowish setae on the rostrum and ascending the forehead are peculiar to forcipata, the others having at most very short sparse white setae, except cyanea, which has a band of white scales in front of and beneath the eyes.
Genus Pactola, Pasc.
In a recent revision of the groups related to this genus Voss (Arb. morp. tax. Ent., iii, 1936, p. 112) has removed Pactola from the vicinity of Stephanorrhynchus and Eugnomus and placed it in the Tachygoninae, a course with which I am unable to agree. This rearrangement is based on characters derived from the comparative lengths of the maxillary palpi, but as indicated above, these organs vary in their development in this group, and in all other respects Pactola is obviously closely related to the Eugnominae. Moreover, apart from various other points, the structure of the tibiae alone would be sufficient to exclude it from the Tachygoninae, in which these organs are strongly uncinate.
Pactola hudsoni, sp.n. (fig. 3).
♀. Testaceous brown, the rostrum blackish; with fairly dense grey scaling; the elytra with a common transverse lunate dark brown band in the middle, extending laterally to stria 4 and having its concave side behind.
Head rugulose, with dense grey scaling hiding the sculpture; the temples as long as the eyes, which are very convex; the forehead nearly as broad as the base of the rostrum, quite flat and in the same plane with the upper surface of the rostrum; a row of erect setae along the margins of the eyes and ascending the vertex. Rostrum shorter than usual, as long as broad, much shorter than the head, gradually widening from base to apex; the dorsum shallowly rugulose and with dense brownish scaling on the basal half. Antennae with the scape testaceous, the rest much darker; joint 2 of the funicle longer than broad. Prothorax as long as broad, cylindrical, not constricted at the apex; the dorsal outline flat from the base to near the apex and then rising to the margin, there being an appreciable space between the margin and the vertex of the head; the dorsum rugulose and uneven, the sculpture being hidden by the scaling. Scutellum oval, somewhat elevated, with dense con-colorous scaling. Elytra subovate, with rather prominent, roundly
rectangular shoulders, with a common transverse impression near the base extending to stria 4 and prominent angular posterior calli; the striae well marked but partly, and the punctures in them entirely, hidden by the elongate scales; the intervals with a row of short stout suberect setae, the alternate ones somewhat convex and slightly higher than others, especially a short costate elevation in the middle of interval 3. Legs testaceous brown, with sparse elongate grey scales, the hind femora with the thickened part piceous except dorsally; the anterior femora without any tooth, that on the hind pair large, sharp and triangular.
Length, 2.7 mm.; breadth, 1.0 mm.
North Island: Waimarino, 2,800 ft., 1 ♀, xii, 1931 (G. V. Hudson).
Most nearly allied to P. demissa, Pasc., which may be distinguished by its much narrower rostrum, which is distinctly longer than broad; the much narrower forehead is slightly convex and on a higher level than the dorsal line of the rostrum; finally there is no trace of posterior calli on the elytra or of the elevation in the middle of interval 3.
It may be noted that the name nitidula is somewhat unfortunate and misleading, because the unique type has obviously had all its scaling rubbed off, so that the species, when rediscovered, may prove difficult to identify.
Pactola posticalis, sp.n. (fig. 4).
♂ ♀ . Derm testaceous brown, with the forehead and rostrum blackish, the pleurae, a subhumeral stripe on the elytra and parts of the femora, piceous brown; pronotum with pale brown scaling and a pale lateral stripe on each side which is sometimes ill-defined; elytra with fairly dense brownish-grey scaling and a large subapical transverse blackish patch beginning near the top of the declivity and not quite reaching the apex, and extending laterally to stria 5.
Head with fawn scaling on the posterior half and blackish in front; the temples shorter than the eyes, which are comparatively large and very convex; the forehead somewhat narrower than the base of the rostrum, strongly convex longitudinally, sloping steeply to the rostrum, the dorsal outline of which is on a level with the middle of the eyes; an irregular row of erect spatulate setae along the eye-margins and continued on the vertex. Rostrum slightly longer than the head, longer than broad, equally wide at base and apex with the sides shallowly sinuate; the dorsum very finely rugulose, with blackish scaling and very short suberect pale spatulate setae. Antennae with joint 2 of the funicle very short, scarcely longer than broad. Prothorax as long as broad, subcylindrical but with a shallow constriction near the apex, which is more shallowly continued across the disk, the dorsum rugulose. Scutellum small, blackish. Elytra oblong-ovate, rounded laterally, widest behind the middle, flat longitudinally from the base to beyond the middle, comparatively narrow at the shoulders, compressed laterally near the apex, and with obtuse posterior calli; the striae distinct and with rather deep punctures showing through the scales, which latter are small, round and of varying sizes; the intervals of even height,
scarcely wider than the striae, slightly convex, each with a row of short erect clavate brown or white setae. Legs testaceous, but the anterior pairs of femora darkened except at the base and apex, the hind pair with a dark patch only on the basal half of the dilated portion, and the tibiae more or less infuscated on the basal half; the scaling on the femora rather sparse and elongate; the anterior pairs of femora with a trace of a minute tooth, the hind pair moderately inflated and with the usual large triangular tooth.
Length, 2.2 mm.; breadth, 0.9 mm.
North Island: Waimarino, 2,800 ft., 1 ♂, xii, 1931 (G. V. Hudson—type); Gollans Valley (Wellington), 1 ♀, xi, 1928 (G. V. H.).
A distinctive species on account of its shape and colouring, its nearest ally being the smaller P. demissa, Pasc., in which the eyes are less prominent and the forehead slopes much less steeply to the rostrum; the elytra are markedly convex longitudinally, sloping upwards from the base to beyond the middle, and have no trace of posterior calli; the tooth on the hind femora is much smaller and there is no tooth on the anterior pairs.
Pactoia fairburni, sp.n.
♂ ♀. Derm of upper side red-brown; the pronotum usually paler than the elytra, with pale scaling which is sparser on the disk and denser and paler laterally, the external margin of the scaling sharply defined, the upper half of the pleurae being bare and blackish, and the lower half sparsely squamose; elytra with brownish grey scaling, with very indistinct remote darker spots on intervals 2, 4, 6, and a more distinct elongate blackish patch at about one-third from the base on interval 4, the lateral margin broadly blackish in the basal two-thirds; underside blackish, with the apex of the venter testaceous.
Head with rather sparse pale scaling, which does not entirely conceal the coarsely punctate surface, and with a few erect clavate setae on each side of the vertex; temples longer than the eyes, which are very convex but do not project much laterally; the forehead deeply depressed below the level of the eyes, much narrower than the base of the rostrum and slightly narrower than an eye, on a level with the upper surface of the rostrum, with a row of erect clavate setae beside each eye. Rostrum much shorter than the head, about as long as broad, gradually widening from base to apex, finely rugulose and squamose on the basal half, without erect setae, and slightly convex transversely between the antennae. Antennae elongate, slender, testaceous, with the basal half of the funicle darker; funicle as long as the scape, joint 2 slender and elongate, the distal joints as long as broad. Prothorax as long as broad, moderately rounded laterally in the posterior half, narrowed and parallel-sided in the apical third, widest behind the middle; the dorsum strongly convex longitudinally, highest behind the middle, closely and strongly punctate; the scales narrower in the middle of the disk (so that the integument is partly visible) and becoming round and denser laterally; a few very short erect setae in the middle of the disk, one or two longer ones in the middle of the lateral margins, and an irregular row along the apex. Scutellum small, rounded,
black, with only a few minute setae. Elytra broadly ovate, sub-acuminate apically, strongly rounded laterally, widest at one-fourth from the base, then narrowing rapidly to the apex, which is excised, the basal margin quite straight from shoulder to shoulder, the latter forming a rounded obtuse angle; the dorsal outline convex, rising from the base to one-third, then sloping to the apex; the striae fine, distinctly punctate; the intervals much broader than the striae, almost flat, without any elevations or posterior calli; the scales very small, fairly dense, of varying shapes and sizes, but much smaller than those on the pronotum; each interval with a sparse row of short stout erect pale setae. Legs testaceous, the anterior pairs of femora with more or less of the distal half black; the hind pair with the basal two-thirds black, sometimes all black except the tooth and a dorsal patch; the tibiae with a black patch on the basal half; the anterior femora without any tooth, the hind pair much inflated and with a very large triangular tooth.
Length, 2 mm.; breadth, 1 mm.
North Island: Whangarei, N. Auckland, 1 ♂, 3 ♀ ♀, vii, 1930 (E. Fairburn).
Forwarded by Mr. A. E. Brookes.
Most nearly allied to P. humeralis, Broun, in which the elytra are much narrower, widest nearer the middle, and with shoulders obliquely rounded, the humeral callus being entirely obliterated; the forehead is on a level with the top of the eyes and nearly twice as wide as an eye; the antennae are much shorter and stouter; the prothorax is parallel-sided and longer than broad.
Genus Stenopactola, Broun.
Stenopactola, Broun, N.Z. Inst. Bull., no. 1, pt. 3, 1914, p. 236.
Parapactola, Voss, Arb. morph. tax. Ent., iii, 1936, p. 121, and iv, 1937, p. 40 (new syn.).
In the earlier of the two papers cited above Mr. Voss erected his genus Parapactola for the reception of a wingless species without any sign of the humeral prominences that are found in the typical forms of Pactola, the genotype mentioned being Pactola demissa, Pasc. Actually, this species has well developed shoulders, and it is clear that there has been a misidentification. Thanks to the kindness of Dr. K. Günther, of the Dresden Museum, I have been able to examine the single specimen upon which the genus was based, and, as anticipated, it proves to be Pactola humeralis, Broun, and not Pascoe's species. The genotype of Parapactola must therefore stand as P. humeralis.
But there are still further complications, because in his later paper, cited above, Mr. Voss has sunk his genus as a synonym of Pactolotypus, Broun, and further has sunk Parapactola humeralis (under the erroneous name demissa) as a synonym of Pactolotypus (“Cyttalia”) depressirostris, Kirsch (=striatus, Broun). As Dr. Günther also kindly lent me Kirsch's type, I am able to confirm Mr. Voss's surmise that striatus is a synonym of it. But I am unable to accept the view that humeralis is referable to the same species, or even that it belongs to the same genus.
Pactolotypus is so far known only from the remote Auckland Islands, more than 300 miles to the south of New Zealand, and differs from typical Pactola in having only 6 joints to the funicle of the antennae instead of 7 and in lacking the humeral prominences on the elytra. Parapactola resembles it in the latter character but agrees with Pactola in having 7 joints to the funicle, and further it differs from both genera in the structure of the hind legs. The hind femora bear only a small tooth, which is sometimes almost obsolete, and the hind tibiae, instead of being strongly curved throughout as in the other two genera, are of the usual Curculionid type, that is, bent near the base and then straight to the apex, just like the middle tibiae.
These distinctions are, however, also to be found in Stenopactola, Broun, and it is to this genus that Parapactola must be referred as a synonym.
Zeacalles brookesi, sp.n.
♀ . Piceous, shiny, with the pronotum, the sutural area of the elytra and the legs red-brown, the rostrum paler; the upper side with long erect clavate brown setae and rather sparse subrecumbent long setiform yellowish scales, which form several erect tufts on the elytra.
Rostrum comparatively slender, with the usual basal dilatation and widening very slightly from the antennae to the apex, shining and with sparse minute punctures, except close to the base where it is finely rugulose and squamose. Antennae testaceous, with the club fuscous. Prothorax subconical, slightly shorter than its basal width, the sides almost straight, with strong subreticulate punctures which become smaller on the pleurae; the long erect clavate setae as long as the two basal joints of the funicle. Elytra of the normal form, ovate, with the dorsal outline strongly convex and the long declivity almost vertical; the shallow striae with deep separated punctures, the tenth row not striate and its basal puncture not larger than the others, striae 3 and 4 uniting at the base, 7 and 8 uniting just before the base; the elongate setiform scales forming the following rather indefinite erect tufts (often abraded): at the base of the suture, at the base and middle of interval 5, before the middle of 3, and the largest at the top of the declivity on 2; each interval with a row of very long erect clavate setae, the longest being longer than the scape. Legs with the tarsi unusually small and narrow.
Length, 1.8 mm.; breadth, 0.7 mm.
North Island: Erua, 1 ♀, i, 1910 (type), 1 ♀, i, 1911 (T. Broun); Okauia, Matamata, Waikato, 2 ♀ ♀, iii, 1922 (A. E. Brookes).
Most nearly allied to Z. varius, Broun, in which however the general clothing is composed of normal small recumbent scales, small tufts of which occur only on an oblique whitish stripe running from the shoulder to the middle of the suture, and the erect spatulate setae are appreciably shorter; the rostrum is more dilated at both base and apex; and the basal puncture in stria 10 is much larger than the others.
Scelidolichus abruptus, sp.n.
♂ ♀. Piceous brown, the legs and antennae red-brown, with fairly dense coppery fulvous scales; the elytra with an approximately triangular large pale patch on each side, having its base at or near the lateral margin for three-fourths of its length and its apex on interval 3, the anterior side of the triangle almost straight, the posterior side bisinuate and with a blackish edging; the underside with sparse suberect pale scales.
Rostrum much shorter than the pronotum (2:3), only slightly constricted at the base, rapidly narrowing from there to the antennae, then gradually widening to the apex; the dorsum forming a continuous curve with the forehead, rugosely punctate and squamose at the base with a short median carina, the remainder somewhat opaque and with fairly close, more or elongate punctures up to the apex. Antennae inserted at the middle of the rostrum, comparatively short; joint 1 of the funicle longer than 2, 3 and 4 as long as broad, the remainder transverse and becoming progressively wider, so that 7 is more than twice as broad as long. Prothorax much broader than usual, a little broader than long, strongly rounded laterally, widest at the middle, not constricted at the apex; the dorsum almost flat longitudinally, evenly set with very close fine punctures, without any median carina, the narrow scales denser than usual but not concealing the sculpture, with short dark erect clavate setae; the pleurae with much larger elongate punctures and a small impunctate area near the base. Elytra proportionately shorter and broader than usual, length to breadth as 7:6; the dorsal outline strongly convex, rising from the base, the posterior declivity almost perpendicular and unusually long, the distance from the base to the top of the declivity being shorter than the declivity itself (5:7); the striae obsolete and the rows of fine distant punctures entirely concealed by the narrow scales; the intervals when abraded not shiny but finely aciculate, and only intervals 1, 3, 5, 7 with a row of short erect spatulate black setae, there being a small group of similar white setae on 3 at the apex of the pale triangular lateral patch and two similar groups on 5, one where the pale marking begins and the other where it ends. Legs with fairly dense fulvous scaling and a broad subapical whitish band on the femora, the lower surface of which bears a sharply defined broad smooth bare furrow for its whole length, the margins of the furrow being carinate; the front femora abruptly widened at one-third from the base, then gradually narrowing to the apex; the front tibiae much shorter than usual. Sternum with the mesosternal cavity much more elevated than usual, being twice as high as the middle coxae, and its margin not rounded but angulate, forming almost a right-angle.
Length, 2.6–3.0 mm.; breadth, 1.5–1.7 mm.
North Island: Mair Park, Whangarei, 4 ♂ ♂, 1 ♀; i, 1929 (E. Fairburn).
Forwarded by Mr. A. E. Brookes.
A very distinct species differing from all its congeners in its relatively broad prothorax, with fine close punctation without any trace of a smooth median line or carina; the unusual length and steepness of the posterior declivity of the elytra, and the occurrence
of erect setae only on the alternate intervals; the clear-cut sulcus on the lower surface of the femora and the sub-basal dilatation of the front pair.
The species which it most nearly resembles in general facies is S. altulus, Broun.
Pentarthrum planum, sp.n.
♀. Dark red-brown, with the base of the antennal scape and the fourth tarsal joints paler, the head and rostrum blackish.
Head deeply constricted behind the eyes, the occiput with a few minute punctures; the forehead wider than the base of the rostrum, with small punctures that are separated at least by the width of their diameters and with a very feeble median fovea. Rostrum somewhat longer than the head (7:5), slightly widening from the antennae to the apex and rapidly dilated from the antennae to the base, punctate like the forehead, but the punctures becoming denser at the apex. Prothorax somewhat longer than broad, widest close to the base, rapidly narrowing (with the sides almost straight) to the deep subapical constriction, which is entirely lateral and does not extend across the disk; the dorsum quite flat in the middle and from the apex almost to the base, with rather fine separated punctures leaving an abbreviated smooth median line. Elytra with closely punctate striae, the intervals with rather irregular minute shallow punctures, slightly broader than the striae on the disk but becoming narrower laterally, striae 7 and 8 coalescing in the basal half, the lateral margin narrowly explanate near the apex; the minute recumbent setae visible only towards the apex. Legs with the tibiae unusually slender, the tarsi also very short and slender, joint 3 being no broader than 2.
Length, 2·6 mm.; breadth, 0·8 mm.
North Island: Gollans Valley, 1♀, xi, 1923 (G. V. Hudson).
Distinguished by its flattened upper surface, short rostrum, comparatively broad straight-sided prothorax, the slightly expanded apical margin of the elytra, and the very short slender tarsi. In the last two characters it approaches Euophryum.
Platyomida verrucosa, Broun 1914, was based on a single male which proves to be only an abraded specimen of binodis, Wht. 1846.
Rystheus hudsoni, Mshl. 1926. After seeing a series of specimens from Mounts Egmont and Pirongia kindly submitted by Mr. A. E. Brookes, I think that this form must be treated as merely a local variation of R. notabilis, Broun 1917.
Pactola nitidula, Broun 1913. The specific name is quite misleading, because the unique type has obviously been almost entirely denuded of scales; I can only regard it as a large pale specimen of demissa, Pasc. 1876.
Pactola fuscicornis, Broun 1913. P. binodiceps, Broun 1913, was based on two specimens that are clearly females of fuscicornis, which was described from a single male; all three specimens were taken at the same time and place.
Sibinia tychioides, Pasc. 1887, is not an indigenous New Zealand species, for an examination of the types shows it to be undoubtedly synonymous with the European Tychius schneideri, Hbst. 1795; the pygidium is only partly exposed in the male and not at all in the female.