on the upper part of its segment; variability in number of spines present is common; female never possesses these spines.

Legs. Long and slender. Fore and middle legs subequal, with hind leg about a third as long again. Fore coxae close together, but not quite touching, each armed with a spine. All femora sulcate below. Femora, tibiae and two proximal segments of hind tarsi armed with variable numbers of spines (see Table I of Variability of Spines on the Legs). No spines occur on fore or middle tarsi. Ratios of length of legs to length of body are: Fore leg, 2: 1; Middle leg, 1.9:1; Hind leg, 3·17:1.

Genitalia. Female: Suranal plate (SAP) variable in shape between two extremes, one rounded and notched medianly, Fig. 3, while other is obtuse-angled laterally and truncated distally, Fig. 2; distal margin clothed with short golden setae. Subgenital plate, Fig. 1 (SGP) constant in shape, being deeply notched posteriorly, and thickly clothed with setae. Male: Suranal plate, Figs. 5 and 6 (SPL) variable in shape, being terminally either concave, Fig. 6C, or convex, Fig. 6A, or an intermediate stage between, Fig. 6B. Subgenital plate (hypandrium), Fig. 9 (H) triangular, 1 25 times as long as wide; sides spreading slightly proximally, tapering to concave distally with a rounded apex; ventral surface with apical protuberance thickly clothed with red-brown setae. Dorsal surface glabrous. Laterally the plate bears two styli, Figs. 5, 9 (S) thickly clothed with short setae; length of styli being just over one-third length of sternite IX Parameres, Fig. 7 (P) broad at base, twice as long as broad, with prolateral edge thickly clothed with long setae. Pseudosternite, Fig. 8 (PD) almost as long as broad, tapering to a point distally. Penis, Fig. 8 (PN) two-lobed, each lobe being twice as long as broad. Paraprocts, Figs. 5, 8, 9 (PP) small, two and a-half times as small as parameres.

Localities. Nelson and Marlborough districts; Stephens Island; Trio Islands, Mana Island; Wellington district; Levin; Wairarapa; Havelock North; Waikato.

Types. Holotype male and female in British Museum collection, but much damaged. Hypotypes in Dominion Museum collection.

Macropathus acanthocera (Milligan, 1926)

1926. Pac [ unclear: ] acanthocera Milligan. Trans. Roy. Soc. N.Z., 56, p. 422, Pl. 79–80.

Plates 29 and 30. Text-fig. 2 Figs. 1–8.

In describing this species Milligan (1926) comments on the similarity in general build and colouring with M. filifer. He says, “The peculiarity which distinguishes this species from all others so far known is that several of the antennal segments carry distinct spines.” Milligan could not have examined any male specimens of M. filifer or he would have observed a number of small, but distinct pointed spines borne on the middle portion of the flagellum. The spines on M. acanthocera however are distinctive, being fewer in number and larger than those of M. filifer and rounded apically. Milligan's species was described from a male specimen only. Examination of both males and females has shown that Milligan had correctly described a new species, but had missed several of its distinctive characters—e.g., the sexual dimorphism in the length of the legs, so that a redescription of the species is necessary.

The species Macropathus acanthocera is now redefined as follows —

Colour. Basic colour medium to dark ochrous, with pronotum, mesonotum, metanotum and abdominal terga irregularly mottled with medium brown mixed

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with light brown; lateral and posterior margins pale ochrous; femora and tibiae of all legs transversely banded with broad bands of light brown interspersed with narrow bands of pale ochrous; tarsi pale ochrous; antennae light brown; ovipositor deep reddish-brown.

Body. Length up to 37 mm. Body sparsely clothed with setae. Ovipositor equal to, or seven-eighths as long as body. Antennae in female 5–6 times as long

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as body, and in male 7–8 times as long as body. Head vertical. Compound eyes laterad. nearly elliptical, twice as long as broad; a single anterior, white, median ocellus only. Fastigium almost as high as long, rising abruptly, slightly sulcate, with base touching scape of antennae. Mandibles small. Maxillary palp with third joint three-quarters length of fourth joint. Pronotum rounded anteriorly

Text-Fig. 2. Macropathus acanthocera (Milligan).
Fig. 1— Male genitalia ventral view, hypandrium in place. Fig. 2—Male genitalia dorsal view.
Fig. 3—Male genitalia ventral view, hypandrium removed to expose structures beneath.
Fig. 4–Parameres. Fig. 5—Female genitalia vential view. Fig. 6—Variations in shape of female subgenital plate Fig. 7–Female genitalia dorsal view. Fig. 8—Male antenna, middle portion of flagellum showing spines. Scale below Fig. 1 applies to Figs. 1–4. Scale below Fig. 7 applies to Figs. 5–8.

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and produced in front over occiput, truncated posteriorly; sternum transversely narrowed; pronotum, mesonotum and metanotum distinctly margined laterally and posteriorly. Cerci Figs. 5, 7 (C), long, tapering, unsegmented, slightly crescent-shaped, clothed with long and short setae. Bodies of male and female subequal.

Antennae. Fig. 8. Very long, slender, tapering flagellum (F), thick and almost touching at base, scape about four times as large as pedicel, which is narrower than scape but broader than other segments; third segment on dorsal aspect narrower than pedicel, but half as long again, and on ventral aspect one quarter as long as pedicel; from fourth segment onwards segments unequal in length, although steadily decreasing in size; all segments thickly clothed with short golden setae. Sexual dimorphism present in antennae, male possessing longer, stouter antennae than female; in male only, at about two-thirds along flagellum (F) from scape, five to seven ventral retrolateral blunt spines (SP) occur, each borne on a swelling on the upper part of its segment; these spines are fewer in number than those of M. filifer, but are larger and have their apices rounded.

Legs. Long and slender. Fore and middle legs subequal, with hind leg-approximately twice length of fore and middle legs. Sexual dimorphism is shown by fore and middle legs of female being two-thirds as long as male, and hind legs of female seven-tenths as long as male. Fore coxae close together, but not quite touching, each armed with a spine. All femora sulcate below. Femora, tibiae and proximal segment of hind tarsi armed with variable numbers of spines (see Table II of Variability of Spines on the Legs). No spines occur on fore or middle tarsi. Ratios of length of legs to length of body: Foreleg, male 2.9:1; female 1·9 :1. Middle leg, male 2.83.1; female, 1.86:1. Hind leg, male 5.86:1; female 3.32:1.

Genitalia. Female: Suranal plate, Fig. 7 (SAP) with lateral and distal margins rounded; subgenital plate, Fig. 5 (SGP) variable in shape, Fig. 6, showing a gradual change from sides short and slightly convex, with distal margin widely emarginate, to sides longer straight or slightly concave, with distal margin widely emarginate. Male. Suranal plate, Fig. 2 (SPL) slightly concave laterally, slightly emarginate terminally; subgenital plate (hypandrium), Fig. 1 (H), triangulate, 1.4 longer than broad, sides spreading slightly proximally, tapering to concave distally with a rounded apex, glabrous on dorsal side, but with apical protuberance on ventral surface, thickly clothed with short red-brown setae. Subgenital plate completely shields genitalia. It bears laterally two styli (S) one on each side thickly clothed with short setae, length of styli being one-fourth length of sternite IX. Parameres, Fig. 4 (P) attenuated, broad at base and tapering to a point, three times as long as broad, prolateral margin thickly clothed with long setae. Pseudosternite, Fig. 3 (PD) compressed dorso-ventrally, nearly twice as broad as long, tapering to a point distally. Penis, Fig. 3 (PN) two-lobed, each lobe nearly as broad as long. Paraprocts, Fig. 3 (PP) large, longer than parameres, one and a-half times as long as broad.

Localities. Titirangi coll J. S. Edwards, A. M. Richards; Waitakere Ranges, coll. R. K. Dell, Auckland. No occurrences of this species have been recorded south of Auckland.

Types. Holotype and paratype males in Cawthron Institute collection.

Text-Fig. 3. Macropathus delli n. sp.
Fig. 1—Female genitalia, ventral view. Fig. 2—Female genitalia, dorsal view.

Macropathus delli n.sp.

Plates 29 and 30. Text-fig. 3. Figs. 1–2. Text-fig. 4. Figs. 1–8.

Colour. Basic colour deep ochrous, with posterior borders of pronotum, mesonotum, metanotum and abdominal terga dark brown; lateral and posterior margins ochrous; nota irregularly mottled with light brown; abdominal terga banded with light brown and ochrous; femora and tibiae ochrous, light brown at their junctions; hind femur with colour pattern poorly defined in pale and deeper ochrous; tarsi pale ochrous; antennae light brown; ovipositor deep reddish-brown.

Body. Length, 26 mm. in male; 31 mm. in female. Body sparsely clothed with setae. Ovipositor five-sixths as long as body. Antennae 3.5–4 times as long as body. Head vertical. Compound eyes laterad, nearly elliptical, twice as long as broad; a single anterior, white, median ocellus only. Fastigium as high as long, rises abruptly, slightly sulcate, with base touching scape of antennae. Mandibles small. Maxillary palps with third and fourth joints subequal in length. Pronotum rounded anteriorly and produced in front over occiput, truncated posteriorly; sternum transversely narrowed; pronotum and mesonotum distinctly margined laterally and posteriorly. Cerci long, tapering in female, Text-fig. 3, Figs. 1, 2 (C), but blunted terminally in male, Text-fig. 4, Fig. 2 (C), unsegmented, clothed with long and short setae.

Antennae. A very long, slender, tapering flagellum, but bases thick and almost touching; scape about four times as large as pedicel, which is narrower than scape, but broader than other segments; third segment on dorsal aspect narrower than pedicel, but half as long again, and on ventral aspect one quarter as long as pedicel; from fourth segment onwards, segments unequal in length, although steadily decreasing in size; all segments thickly clothed with short