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Volume 68, 1938-39
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A New Genus of Collembola in New Zealand and the Genus Lepidosira.

[Read before the Wellington Philosophical Society, April 27, 1938; received by the Editor, April 30, 1938; issued separately, December, 1938.]

The genus Lepidosira Schott contains six species, five of which were described by Schott from Australia (4) and Sarawak (1), and the sixth from New Zealand described by Womersley. The present paper adds seven more species to the genus, all from New Zealand, and introduces a new genus Urewera related to Lepidosira and containing, so far, five species and three sub-species new to science.

In studying the Lepidosira-like Collembola of New Zealand it quickly became evident that there existed a number of forms which could not be definitely placed in that genus; and it is to receive these that I now propose the new genus Urewera.

Collembola—Arthropleona.

Family Entomobryidae Börner.

Sub-family Entomobryinae Börner.

Tribe Entomobryini Börner.

Genus Urewera nov.

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Genotype Urewera fuchsiata n.sp., slide 3/82 Dominion Museum Collection.

This genus is characterised by the development of what can only be described as two accessory claws to the foot. These structures are not pseudonychia, but small accessory or secondary claws, each arising independently from the base of the foot above the base of the claw, one on each side, on all feet. In position they are more dorso-lateral than lateral, passing downwards along the sides of the claw, generally with a gentle outward curve, and reaching to from one-quarter to almost one-half of the length of the claw. (Plate 35, figs. 2 and 3). These structures in Urewera must not be confused with the wing-like teeth of Pseudosinella, from which they are distinct. Specimens of Urewera do occur, however, in which the accessory claws curve inwards across the inner margin of the claw, giving it the appearance of a Pseudosinella. In describing P. magna in Trans. Roy. Soc. of N.Z., vol. 67, p. 355, I now find that I made this error in observation and that this species must now be washed out and incorporated in the genus Urewera (spec. tridentifera). There always is a single tenent hair, distally clubbed, to each foot. The scales of Urewera generally are lightly pigmented, oval in shape, and always heavily and prominently striated, the striations appearing as rows of short dark lines. On closer examination these striations can be seen to be

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rows of short thick spines projecting from the surface of the scale at a very low angle. On scales in the posterior region of the body the spines often are longer and project at a greater angle. They give the edges of the scale a broken or “feathered” appearance.

Key to the Species of Urewera.

Claws of feet with five teeth U. fuchsiata sp. nov.
Claws of feet with four teeth, empodial appendage not reaching distal tooth:—
(a) Ground colour ochreous-brown U. tridentifera sp. nov.
(b) Ground colour bright yellow U. flava sp. nov.
(c) Ground colour diffused with pale violet U. tridentifera violacea sub-spec. nov.
(d) Ground colour orange-brown, body suffused with irregular dark pigment patches U. tridentifera lichenata sub-spec. nov.
Apical tooth sometimes missing, empodial appendage reaching distal tooth U. inconstans sp. nov.
Claw with two teeth:—
(a) Body purple coloured U. purpurea sp. nov.
(b) Body ochreous with purple bands U. purpurea reducta sub-spec. nov.

Urewera fuchsiata sp. nov.

Length of body: 2.5–4 mm.

Colour: In life, pale olive-green to dark green, with darker bluish-green markings. Mounted specimens show a body colour of pale yellowish cream, with the intersegmental margins marked by bands of blue. Patches of blue and greenish pigment occur irregularly over the body, particularly on Abd. IV. The legs and antennae are pale ochreous with bands of dark blue, especially on the legs. Scales greenish-brown, prominently striated.

Body: More or less evenly clothed with scales and occasional setae. Prominent tufts of setae occur on the head, apex of mesotergum, and in the posterior region of abdomen. Many of these are strongly ciliated, especially those surrounding the tip of the abdomen; while those at the apex of the mesotergum are bent over at their tips and ciliated on the outer flattened portion. This latter type of setae I find quite often on Collembola; and I propose the term flexed setae for use henceforth in describing them. Head diagonal somewhat longer than mesothorax. Antennae four-segmented, the segments related as 15:30:26:34:, slightly longer than half the body, thickly clothed with hair and occasional long setae. The first three antennal segments scaled, these scales long, narrow, and pointed at apex. Ocelli, eight to each side, situated on dark pigment patches joined by a dark frontal line, often incomplete. No post-antennal organ. Anterior pair of eyes very large, four of the remainder medium, and two small. Ventral tube short and invested at its tip with a number of long, curved ciliated setae. Abdomen IV 3–3.½ times longer than Abd. III.

Legs: Scaled and bearing numerous long setae, the claw grooved on inner margin with two basal inner teeth about one-third from base, two distal inner teeth at a little over two-thirds, and a single apical tooth a little past halfway between distal pair and apex.

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Paired teeth arranged one on each side of claw groove. Two long, prominent outer accessory claws reaching to level of first pair of teeth. Empodial appendage about two-thirds length of claw, lanceolate. Tenent hair almost as long as claw.

Furcula: Reaching to ventral tube, thickly clothed with long setae, many of which are ciliated. Dentes slightly longer than manubrium, corrugated, and annulated; scales dorsal only, long and narrow, and easily rubbed off. Mucrones bidentate with a single external basal spine.

Localities: From under the bark of native fuchsia trees, Waihui Gorge, Urewera Country, and under stones, Waimana Gorge, Bay of Plenty, 1937.

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Type: Slide 3/82, Dominion Museum Collection.

Urewera tridentifera sp. nov.

Length of body: 2.8–4 mm.

Colour: This is the most variable species of the genus, two distinct colour forms besides the type being distinctly recognisable. In the typical form, in mounted specimens the basal body colour is pale ochreous with areas of deep violet to purple pigment, as follows: Across front and along sides of head, along ventral edges of thoracic pleura and Abd. I; across anterior and posterior portions of mesothorax, across and slightly down the sides of the posterior halves of metathorax and abdominal segments I and II, and extending right down the sides of Abdomen III. On the rear and sides of Abd. IV and V. Antennal segments I and II pale brown, III darker brown, IV very dark brown with tinge of violet. Legs dark violet, ochreous at joints. The intensity of the pigmented areas often is accentuated by the clothing of scales which generally is heavier in these areas. In life the insect appears greenish-orange, iridescent, with very dark markings across mesothorax, on sides of Abdomens II and III, and on sides and across rear of Abd. IV. Between Abd. III and rear of Abd. IV there usually shows on dorsal surface a conspicuous triangular area, apex directed posteriorly, of light ochreous colour, bounded by the areas of dark pigment.

Body: More or less completely clothed by pale-brown, oval-shaped scales, heavily striated. A tuft of flexed setae at the apex of the mesotergum. Occasional long, ciliated setae occur at random over the body; but from Abdomen IV back there are numerous exceedingly long, ciliated setae extending out from the body in all directions. Around tip of abdomen there often are a number of shorter plumose setae, though these may be entirely absent in many specimens. In all probability they are a sexual adornment. There is a long, thin, sensory, finely-ciliated setae rising vertically from dorsal surface of Abdomen II, and several longer similar setae from rear portion of Abdomen IV. Tergum of mesothorax completely covers prothorax. Head double the length of the metathorax. Ocelli as in fuchsiata, eight on each side, six large and two small, situated in dark pigment patches. No post-antennal organ. Antennae four-segmented, scaled on first three segments, with long, narrow, apically-pointed scales,

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thickly clothed with ciliated hairs and occasional long setae. Segments related as 18:36:34:34. Ventral tube long and invested with several long, curved, ciliated setae. Abdomen IV 3½–4 times longer than Abd. III.

Legs: Scaled, with long, narrow, apically-pointed scales, and bearing many ciliated setae. Claw grooved on inner margin, from base to proximal paired teeth, thereafter fading out. Proximal paired teeth situated about one-quarter down from claw base, and very close together, so that often it is difficult to detect that they are paired. A distal tooth occurs at about three-quarters of the way down from the claw base and a third smaller apical tooth about midway between the distal tooth and the apex of the claw, accessory claws reaching to one-third of the length of the claw. Empodial appendage lanceolate, approximately half the length of the claw, never reaching down as far as the distal tooth. Tenent hair about equal to the claw in length.

Furcula: Reaching forward to ventral tube. Thickly clothed with ciliated setae which towards tip of dens become very long, over-reaching the mucro. Mucrodens a little longer than manubrium. Dentes scaled, with long, narrow, apically-pointed scales; corrugated and annulated. Mucro somewhat long, bidentate, with a single basal spine.

Localities: This species is particularly common under the bark of old trees and fallen, decaying branches and logs in all native bush, in association with lichen on trees (sub-spec. lichenata) and also is found in decaying leaves and debris on the forest floor or in the forks of trees, throughout Urewera Country up to altitudes of about 2500 ft., and in the Akatarawa Valley and Divide. It seems to be the commonest bark species so far discovered. From about 2500 ft. and above it appears to be displaced by Urewera flava n.sp.

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Type: Slide 3/96, Dominion Museum Collection.

Urewera tridentifera lichenata sub-sp. nov.

This is a distinct form found generally in association with lichens on tree trunks, in which there is, in addition, a suffusion of more or less irregular small black pigment patches all over the body. In life this form appears orange-brown, with very dark brown markings.

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Type: Slide 3/86, Dominion Museum Collection.

Urewera tridentifera violacea sub-sp. nov.

This is another distinct form in which the body is completely diffused with pale-violet or purple pigment, except for the head, where a tendency to pale ochreous may still persist. The areas of pigmentation occurring in the type are picked out in this variety as areas of deeper violet or purplish pigmentation. In life these forms appear as dark greenish-brown with darker markings, sometimes approaching to an almost complete iridescent bluish-black.

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Type: Slide 3/92, Dominion Museum Collection.

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Urewera flava sp. nov.

Length of body: 2.5–2.75 mm.

Colour: Typically bright yellow, with or without markings as in U. tridentifera. Markings when present are brown or violet-brown in colour. Readily recognised in life by the predominant bright yellow or sometimes yellowish-green body colour. Legs brown, yellowish at the joints, tarsi bluish. Antennae brown, darkening to deeper colour or violet towards apex.

Body: Head approximately equal to mesothorax in length. Ocelli eight on each side, the inner anterior ocellus generally the largest, the anterior pair larger than the remainder, of which four are medium to large and two small. Each group situated on dark pigment patches which surround also the bases of the antennae and unite across the front of the head. No post-antennal organ. Antennae four-segmented in ratio of 11:25:25:27. First three segments scaled. All segments clothed by moderately long setae. Antennae about equal in length to half the body.

Body scales oval and yellow to pale-brown in colour, heavily striated. Scales of legs, antennae and dentes long, narrow and apically-pointed. A prominent tuft of flexed setae at apex of mesothoracic tergum, which latter completely covers the prothorax. Occasional long setae occur over the body, with long, ciliated setae around posterior region as in U. tridentifera. Abd. IV four times longer than Abd. III.

Legs: Scaled and clothed with finely-ciliated setae. Claw and empodial appendage as in U. tridentifera with proximal paired teeth at about one-third from claw base.

Furcula: Similar to U. tridentifera.

Localities: Under bark of beech and rimu trees, Mt. Ngamoko, Lake Waikaremoana, from 2500 ft. to summit, 3640 ft.

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Type: Slide 3/100, Dominion Museum Collection.

Urewera inconstans sp. nov

Length of body: 1.8–2 mm.

Colour: Ochreous brown in mounted specimens, with ventral edges of thoracic pleura and those of Abd. I, II and III deep violet. Abd. III with prominent band of violet extending across and halfway down the sides. Violet pigment along posterior edge of sides of Abd. IV. Sometimes the thorax may be lightly suffused more or less all over with pale violet. Legs mainly bluish, ochreous at joints. Basal two antennal segments brown, terminal two dark blue. Scales of body oval in shape to round, narrower and pointed elsewhere, heavily striated.

Body: Occasional long ciliated setae occur over the body, especially around the posterior region. Shorter ciliated hairs clothe the head and antennae. A tuft of flexed setae at the apex of the mesotergum, which latter completely covers the prothorax. Long, slender, finely-ciliated, sensory setae arise vertically, one from Abd. II and

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one from Abd. III. There is one similar but longer seta arising dorsally, and one on each side of, Abd. IV. A tuft of long, ciliated setae on each side of posterior extremity of ventral groove. There is a row of short spines across the posterior margin of the head. Antennae a little more than one-third the length of the body four segmented, the first two segments scaled, the four related in length as 6:11:8:13. Ocelli eight to each side, six large and two smaller. Head diagonal almost equal to thorax in length. Abdomen IV from 4 to 4½ times longer than Abd. III. Ventral tube long.

Legs: Scaled and clothed with hairs and long setae. Claw with inner groove reaching to proximal tooth at about one-third from claw base. Proximal teeth paired, the pair being difficult to detect as the teeth are very closely adpressed laterally. A single distal tooth at about two-thirds and generally, but not always, a third smaller tooth about one-third back from the apex of the claw the distance from the apex to the first and larger distal tooth. The empodial appendage long, narrow, and lance-like, reaching as far as or just past the first distal tooth. Tenent hair about equal to the claw in length.

Furcula: Clothed by ciliated setae which are very long towards tip of dentes and considerably over-reach the mucrones. Manubrium and mucrodens related as 6:7. Dentes heavily scaled, annulated, and corrugated. Mucrones bidentate, the sub-terminal tooth large, and with a basal spine.

Localities: In leaf mould, Waihui Gorge; on shores of Lake Waikaremoana; on top of Huiarau Range, 3200 ft., Urewera Country; and at Akatarawa, 1937. Also found under bark near Lake Waikareiti; in Hopuruahine Gorge; and on Mt. Ngamoko, 3600 ft., Urewera Country, 1937.

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Type: Slide 3/107, Dominion Museum Collection.

Urewera purpurea sp. nov.

Length of body: 1.9–2.4 mm.

Colour: In life pale purple to pale greyish-purple. In mounted specimens the head, thorax, and abdominal segments I, II, and III are wholly purple in colour. The anterior portion of Abd. IV is paler in colour or the ground colour of the body may show through as pale ochreous. The posterior portion of Abd. IV, Abd. V, and Abd. VI deeply pigmented with purple. The dorsal surface of the head generally is paler in colour than the sides. Antennae purple, changing to deep violet in segments III and IV. Legs purple, with deep-violet tarsi. Furcula purple at base, passing into pale ochreous in dentes.

Body: Heavily scaled with pale-purple-coloured scales, heavily striated. A group of flexed setae at apex of mesothorax. A number of finely-ciliated long setae around tip of abdomen. A single very fine sensory seta arises vertically from Abd. II. The head is clothed by short ciliated setae in addition to scales. There is a row of short spines across the posterior dorsal margin of the head. Ocelli, eight to each side, six large and two small. Antennae four-segmented, first two segments only with long, narrow, pointed scales, and ciliated

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setae. Third segment with plain setae and terminal segment clothed with short, fine hairs. Head approximately equal to thorax in length. Antennae less than half the body in length, the segments related as 4:10:7:10. Abdomen IV 3–3½ times longer than Abd. III.

Legs: Clothed with ciliated setae and long, narrow, pointed scales. Claw with three teeth on inner margin, the proximal paired and at about one-quarter from base, the distal two-thirds. Secondary claws reaching to proximal tooth. Empodial appendage reaching to distal tooth, narrow and lanceolate. Tenent hair shorter than claw.

Furcula: Clothed by ciliated setae, dentes scaled with long, narrow, apically-pointed scales. A prominent ring of stout setae on manubrium at junction with dens. Manubrium and mucrodens equal. Dentes corrugated and annulated. Mucrones bidentate with basal spine, somewhat elongate and surrounded by ciliated setae.

Localities: In old log, 3000 ft., and among forest debris, 3600 ft., on Mt. Ngamoko; among leaf mould, Waihui Gorge and Aniwaniwa Arm, Lake Waikaremoana; in leaf mould near Blue Lake, Rotorua, 1937.

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Type: Slide 3/143, Dominion Museum Collection.

Urewera purpurea reducta sub-sp. nov.

Specimens occur, constituting a distinct variety, in which the body is ochreous in colour with concentrations of purple pigment along the ventral edges of the terga and toward the posterior region of Abd. IV and on Abd. V. Narrow, very pale bands of purple encircle the anterior portion of each segment. This form I have distinguished as U. purpurea reducta.

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Type: Slide 3/150, Dominion Museum Collection.

Genus Lepidosira Schott.

The striations characteristic of Lepidosira scales are formed similarly to those of Urewera by rows of short projecting spines.

Key to the New Zealand Species of Lepidosira.

A. Distinctly segmented species:—
Very small, violet-coloured, with one inner tooth to claw L. minima n.sp.
Small, brownish-coloured, with three inner teeth to claw L. minuta n.sp.
Large, blue-coloured, with one pair inner teeth to claw L. rotorua n.sp.
Abdomen with six dorso-lateral pigment spots L. sexmacula n.sp.
Claw with three teeth, mucro with strongly recurved sub-apical tooth L. fuscata Wom.
Claw with two teeth, empodial appendage truncate L. okarita n.sp.
Claw with two teeth, empodial appendage lamellate and bluntly-pointed on inner margin L. bidentata n.sp.
B. Segmentation indistinct, brown species, no teeth to claw L. indistincta n.sp.
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Lepidosira minuta sp. nov.

Length of body: 1.4–1.6 mm.

Colour: Ochreous brown to dark reddish-brown, with darker purple-brown markings along ventral edges of thoracic pleura. Metathorax, abdominal segments I, II, and III, and from hinder portion of Abd. IV to tip of abdomen more or less dark-purple-brown. Head ochreous, varying to violet anteriorly. Antennae ochreous at base, changing through pale-violet to deep-violet in terminal segment. Legs proximally brown, merging into dark-violet distally. Furcula ochreous.

Body: Scaled with brown, oval or rounded, heavily-striated scales. Flexed setae occur on the head and occasionally on the body, with a prominent tuft at apex of thorax. Groups of long ciliated setae occur around Abd. IV, V, and VI. Head about equal to thorax in length. Ocelli eight to each side, seven large and one small, on dark pigment patches. No post-antennal organ. Antennal segments related as 4:8:7:11. All segments scaled and clothed by moderately long setae, the scales long, narrow, and apically-pointed. Abdomen IV four times as long as Abd. III. Ventral tube long and with two distinct lips.

Legs: Covered with fine clothing hairs and moderately long setae, the majority of which are finely ciliated. Claw with three inner teeth, the larger and proximal tooth about one-third from claw base, the distal about two-thirds, and halfway between this and the apex is a third very small tooth. Empodial appendage reaching almost to the second tooth. A tenent hair to each foot about equal in length to claw.

Furcula: Reaching forward to last pair of legs. Clothed by setae. Manubrium to mucrodens as 17:14, dentes corrugated and annulated, scaled with long, narrow, pointed scales. Mucrones bidentate with a basal spine, surrounded and overreached by long ciliated setae.

Locality: From old log near Lake Waikare-iti, 2300 ft., 1937.

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Type: Slide 3/120, Dominion Museum Collection.

Lepidosira minima sp. nov.

Length of body: 0.75 mm.

Colour: Basal body colour in mounted specimens very pale cream, more or less tinged with violet. A heavy violet line along ventral edges of pleura and narrow violet bands around posterior margin of all segments. Abdomen III all violet, and Abdomen IV with broad violet band around the middle. Head violet. Antennae violet deepening towards apex. Legs violet, paler at joints. Furcula pale cream. In life, general colour is pale-violet.

Body: Scales are very scarce, the few present being yellowish-brown and striated. Flexed setae occur on top of head and at apex of mesothorax. Occasional setae occur over the body, and several long, slender setae arise from the posterior portion of Abd. IV and from Abd. V and VI. Antennae almost twice as long as head

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Fig. 1.—Urewera fuchsiata sp.nov.: Whole insect. Fig. 2.—Urewera fuchsiata sp.nov.: Foot. Fig. 3.—Urewera fuchsiata sp.nov.: Foot, showing accessory claws. Fig. 4.—Urewera fuchsiata sp.nov.: Mucro. Fig. 5.—Urewera fuchsiata sp.nov.: Ocellar group. Fig. 6.—Urewera fuchsiata sp.nov.: Scale from body. Fig. 6a.—Urewera fuchsiata sp.nov.; Scale from body, side view. Fig. 7.—Urewera fuchsiata sp.nov.: Scale from antenna?. Fig. 8.—Urewera tridentifera sp.nov.: Whole insect. Fig. 9.—Urewera tridentifera sp.nov.: Foot. Fig. 10.—Urewera tridentifera sp.nov.: Tip of dens and mucro. Fig. 11.—Urewera inconstans sp.nov.: Foot. Fig. 12.—Urewera inconstans sp.nov.: Mucro. Fig. 13.—Urewera purpurea sp.nov.: Mucro. Fig. 14.—Urewera purpurea sp.nov.: Foot.

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Fig. 15.—Lepidosira minima sp.nov.: Whole insect. Fig. 16.—Lepidosira minima sp.nov.; Foot. Fig. 17.—Lepidosira minima sp.nov.: Mucro. Fig. 18.—Lepidosira minima sp.nov.: Ocellar group. Fig. 19.—Lepidosira minuta sp.nov.: Foot. Fig. 20.—Lepidosira minuta sp.nov.: Mucro. Fig. 21.—Lepidosira minuta sp.nov.: Ocellar group. Fig. 22.—Lepidosira minuta sp.nov.: Whole insect. Fig. 23.—Lepidosira rotorua sp.nov.: Ocellar group. Fig. 24.—Lepidosira rotorua sp.nov.: Whole insect. Fig. 25.—Lepidosira rotorua sp.nov.: Tip of dens and mucro. Fig. 26.—Lepidosira rotorua sp.nov.: Foot. Fig. 27.—Lepidosira bidentata sp.nov.: Mucro. Fig. 28.—Lepidosira bidentata sp.nov.: Foot.

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Fig. 29.—Lepidosira sexmacula sp.nov.: Whole insect. Fig. 30.—Lepidosira sexmacula sp.nov.: Foot. Fig. 31.—Lepidosira sexmacula sp.nov.: Macro. Fig. 32.—Lepidosira okarita sp.nov.; Foot. Fig. 33.—Lepidosira okarita sp.nov.: Mucro. Fig. 34.—Lepidosira okarita sp.nov.: Ocellar group. Fig. 35.—Lepidosira indistincta sp.nov.: Ocellar group. Fig. 36.—Lepidosira indistincta sp.nov.: Foot. Fig. 37.—Lepidosira indistincta sp.nov.: Mucro. Fig. 38.—Urewera flava sp.nov: Whole insect. Fig. 39.—Urewera flava sp.nov.: Ocellar group. Fig. 40.—Urewera flava sp.nov.: Mucro.

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diagonal, clothed by short setae, the segments related as 3:6:6:8. Ocelli eight to each side, all large, on dark pigment patches. Abdomen IV three times as long as Abdomen III.

Legs: Clothed by moderately long setae, claw with single external basal tooth and one inner tooth near the apex. Empodial appendage a little longer than half the claw. A single tenent hair, almost as long as the claw, to each foot.

Furcula: Reaching forward to ventral tube. Manubrium to mucrodens as 11:13. Dentes annulated and corrugated, scaled lightly with long, thin scales difficult to detect. Furcula clothed with setae, which around mucrones are long and ciliated. Mucrones bidentate with basal spine, the terminal tooth shorter.

Locality: In leaf mould, Akatarawa, 1937.

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Type: Slide 3/146, Dominion Museum Collection.

Lepidosira rotorua sp. nov.

Length of body: 2.8–3 mm.

Colour: In life a beautiful deep blue In mounted specimens body and appendages all a deep blue. There is a tendency for a trace of yellowness along the dorsal surface of the thorax, and abdominal segments I, II, III, and V.

Body: Lightly scaled, with brownish scales strongly striated, a tuft of stiff setae at apex of mesothorax, and occasional similar setae over body. Short, stiff, ciliated setae around tip of abdomen. Tufts of long ciliated setae at ventral posterior edge on each side of ventral groove. Head slightly longer than mesothorax. Antennae scaled on first three segments and heavily clothed with short, finely-ciliated setae. Segments related as 9:14:12:20. Ocelli eight to each side, six large, two small, on dark pigment patches. No post-antennal organ. Terga of mesothorax completely covers prothorax. Mesothorax considerably longer than metathorax as 19:10. Ventral tube short and stout. Abdomen IV five times longer than Abdomen III.

Legs: Scaled and clothed by long and short ciliated setae. Claw with paired inner teeth at about one-third from base and small external tooth. Empodial appendage about two-thirds length of claw; lamellate, truncate on inner margin and finely pointed. A single tenent hair to each foot slightly less than the claw in length.

Furcula: Reaching forward to ventral tube. Clothed with setae. Manubrium to mucrodens as 28:32. Dentes scaled by small elongate lancet-shaped scales. Mucrones bidentate, with a single basal spine. Apical tooth smaller and blunt. Mucrones surrounded by long ciliated setae.

Locality: From amongst dead leaves in bush on shores of Blue Lake, Rotorua, 1937.

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Type: Slide 3/128, Dominion Museum Collection.

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Lepidosira bidentata sp. nov.

Length of body: 2–3.25 mm.

Colour: Yellowish-brown, with deep-blue to violet patches on the sides and ventral surface of the head and body segments. Legs mainly bluish, but with femurs brown. Antennae deep-blue with joints pale-brown.

Body: Scaled with brown, heavily-striated scales. A tuft of stout setae occurs at apex of thorax, and strongly ciliated long setae arise around posterior region of abdomen. Antennae slightly less than half the length of the body, thickly clothed with short setae, but no scales, the segments related as 12:23:20:34. Ocelli eight to each side, all large, on dark-blue pigment patches joined by a line of dark-blue pigment across front of head. No post-antennal organ. Tergum of mesothorax completely covers prothorax. Abdomen IV five times as long as Abdomen III. Ventral tube long.

Legs: Claw with one pair of large basal inner teeth, at about one-quarter from base. Empodial appendage broadly lamellate, bluntly pointed on inner margin and sharply-pointed apically. Single tenent hair to each foot about equal to claw in length.

Furcula: Reaching forward to mesothorax. Manubrium slightly shorter than mucrodens. Dentes heavily clothed by ciliated setae, many of which at the tips overreach the mucrones, annulated and corrugated, and scaled with long lancet-like scales. Mucrones bidentate, with single basal spine. Subterminal tooth very large.

Locality: In forest debris, Aniwaniwa Arm, Lake Waikaremoana, 1937.

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Type: Slide 3/125, Dominion Museum Collection.

Lepidosira sexmacula sp. nov.

Length of body: 2.25 mm.

Colour: Pale yellow ochreous with a trace of blue pigment along ventral edge of mesothorax. There are three prominent patches of blue pigment on each side of the abdomen, one on Abd. III, one in centre of Abd. IV, and one on Abd. V. There is also a small patch of blue pigment on posterior ventral region of Abd. IV. Antennae pale brown, darker at joints, and shading to violet in third and terminal segments. Legs and furcula pale ochreous.

Body: Sparsely scaled, scales pale brown, striated, and oval in shape. A tuft of short setae at apex of thorax. A few short ciliated setae around tip of abdomen. Body otherwise mainly bare. Head slightly longer than mesothorax. Ocelli eight on each side, six large and two small. No post-antennal organ. Antennae four-segmented, the segments related as 6:10:10:15. Retractile organ at apex. Mesothorax completely covers prothorax and is related to metathorax as 15:9. Abdomen IV five times longer than Abdomen III.

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Legs: Clothed with short ciliated setae and sparsely by lancet-like scales. Claw with two outer basal teeth, one to each side, and two prominent inner teeth, one at about one-quarter and the other at three-quarters down the claw. Empodial appendage about two-thirds the length of the claw and slightly truncate on inner margin. A single tenent hair to each foot somewhat shorter than the claw.

Furcula: Reaching forward to anterior pair of legs. Manubrium related to mucrodens as 20:23. Scales of dentes long and narrow, lancet-shaped. Dentes annulated and corrugated and clothed with setae. Mucrones bidentate with basal spine, the apical tooth small. Mucrones surrounded by short ciliated setae.

Locality: In bush debris on forest floor, Okarita Lake, Rotorua, 1937. A single specimen only obtained.

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Type: Slide 3/119, Dominion Museum Collection.

Lepidosira indistincta sp. nov.

Length of body: 2.7 mm.

Colour: A uniform pale ochreous. Legs and furcula ochreous or pale violet. Basal antennal segments ochreous with a violet tinge, segments III and IV deep violet. Ant. II becomes violet towards joint with Ant. III.

Body: Head and trunk heavily clothed with typical pale brown striated scales. Numerous long ciliated setae occur over body, especially on abdominal segments IV, V, and VI. A prominent tuft of flexed setae at apex of mesothorax. Head diagonal, slightly longer than mesothorax. Ocelli eight to each side, one large, five medium, and two small, situated on dark pigment patches joined across front of head by deep violet band, which also skirts bases of antennae. Antennae slightly less than half the body in length; four-segmented, related as 7:12:10:17, scaled on first two segments and well-clothed by setae, many of which are ciliated. Ant. IV bears very short setae only. A row of short spines across posterior dorsal margin of head. No post-antennal organ. Segmentation very indistinct. Abd. IV about three times longer than Abd. III.

Legs: Not scaled, but clothed thickly with short, heavily-ciliated setae. Claw without any properly-defined teeth, but a slight irregularity like a rudimentary tooth about one-quarter from the base. Empodial appendage sharply pointed with a distinct inner and outer lamella and “mid-rib.” A single tenent hair to each foot about equal in length to the claw.

Furcula: Thickly clothed with setae, many of which are ciliated. Dentes only feebly corrugated and annulated. Scales lancet-like. Mucro-bidentate with basal spine, somewhat long and parallel-sided, surrounded by long, ciliated setae.

Locality: Waioeka Valley, Urewera Country, from old rotten tree stump, 2000 ft., 1937.

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Type: Slide 3/147, Dominion Museum Collection.

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Lepidosira okarita sp. nov.

Length of body: 2.1 mm.

Colour: In life, ginger-brown. Mounted specimen shows basal body colour of pale ochreous with bright orange-brown pigment on front of head, along anterior ventral edge of mesothorax, and on basal segments of legs. Antennal segments I and II pale brown, III and IV shading to pale violet, becoming deeper towards apex. Legs mainly ochreous, becoming violet on tarsi. Body colour becomes darker or lighter as clothing of scales is heavy or light.

Body: Heavily clothed with scales, of which there are two types: (1) Pale coffee-coloured, heavily striated, and either oval or almost round in shape. On the head and thorax they are mostly oval, on the remainder of the body almost entirely round. Some of these scales are very large, round ones measuring as much as .06 mm. in diameter, and oval ones up to .13 mm. long. Basally, the scale-colour is very pale, becoming stronger at about one-third from the base of the scale. (2) Bright yellow scales, which are very transparent and lightly striated, either round or oval in shape, many of them quite large. They occur mainly as bands between the segments, principally between abdominal segments II and III and III and IV. A few isolated yellow scales occur on Abd. IV. On the antennae, legs, and furcula, particularly on the dentes, the scales become long, narrow, and apically-pointed, rather lancet-like in shape. Head slightly longer than mesothorax. Ocelli eight to each side, five large, three small, on dark pigment patches. Antennae scaled and clothed with short, ciliated setae with occasional longer setae on second segment. Retractile organ at apex. Segments related as 7:19:15:18. Numerous short ciliated setae occur over the surface of the head. A row of short spines across the posterior dorsal margin of the head. Numerous fine ciliated setae fringe the ventral edge of the thoracic pleura and on abdominal segments III and IV. There is a very long and thin vertical sensory setae on Abdomen II. Abdominal segment IV four times longer than Abdomen III. Ventral tube short and yellow in colour.

Legs: Scaled and clothed with ciliated setae. Claw grooved on inner margin, with paired proximal inner teeth at about one-third from base and single distal tooth at about two-thirds. A single basal external tooth. Empodial appendage lanceolate and reaching to distal tooth. A single spur hair, not distally-clubbed, to each foot.

Furcula: Reaching to ventral tube, scaled and clothed with ciliated setae. Manubrium to mucrodens as 33:38. Dentes annulated and corrugated. Mucrones bidentate with basal spine, the apical tooth the smaller. Strongly ciliated setae overreach the mucrones.

Localities: In leaf mould, under tree-ferns on shore of Okarita Lake, Rotorua; in leaf mould, Mamaku Hill, Rotorua, 1937.

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Type: Slide 3/117, Dominion Museum Collection.

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Selected Bibliography.

Borner, C., 1906. Das System der Collembolen, Mitth. Nat. Hist. Hamburg, 23, 147–188.

— 1913. Die Familien der Collembolen, Zool. Ang., vol. XLI, 315.

Salmon, J. T., 1937. Descriptions and Notes on Some New Zealand Collembola, Trans. Roy. Soc. N.Z., vol. 67 (Dec.).

Schott, H., 1917. Collembola in Results of Dr. E. Mjoberg's Swedish Expedition to Australia, 1908–1913, Ark. f. Zool., vol. II.

— 1925. Collembola from Mt. Murud and Mt. Dulit in Northern Sarawak, Sarawak Mus. Journ., vol. III, pt. 1, no. 8, 107–127.

Womersley, H., 1930. A further collection of Collembola from New Zealand, Ent. Monthly Mag., vol. LXVI, March, 1930.

— 1934. On some Collembola-Arthropleona from South Africa and Southern Rhodesia, Annals South Afric. Museum, vol. XXX, pt. 3, 441–475.

— 1934. A preliminary account of the Collembola-Arthropleona of Australia, Trans. and Proc. Roy. Soc. Sth. Australia, vol. LVIII (Dec.), pp. 86–138.