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,

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.

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

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