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Volume 70, 1940-41
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Genotype: Procerura violacea sp. nov.

This genus is similar to Proisotomurus Wom., from which it is distinguished by the complete absence of abdominal bothriotrichia. There are four rows of slender papillate dental spines, two of which run the full length of the dens, the other two generally finishing between a half and two-thirds down from the base. The empodial appendage is tri-lamellate.

The genus contains five species and one variety. One of the species, P. violacea, being exceedingly common in the North Island.

Key to the New Zealand Species of Procerura.
1. Dark-coloured species with tenent hairs of tibio-tarsi clavate. 2
Lighter coloured species with tenent hairs of tibio-tarsi not clavate or entirely absent. 5
2. With one clavate tenent hair to each claw. 3
With three clavate tenent hairs in line across each tibio-tarsus. 4
3. Purple-coloured species. P. purpurea sp. nov.
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4. Violet to slate-coloured forms
(a) With eight ocelli to each side, six of which are large and two small. P. violacea sp. nov.
(b) With eight large equal ocelli to each side. P. violacea subsp. aequaoculata nov.
Deep purple to black-coloured forms with a creamy-coloured head. P. montana sp. nov.
5. With two non-clavate tenent hairs to each claw. Apical and pre-apical teeth of mucro unequal. Post-antennal organ very large. P. fasciata sp. nov.
Without any tenent hairs to each claw. Apical and pre-apical teeth of mucro equal. Post-antennal organ very small. P. serrata sp. nov.

Procerura violacea sp. nov. Plate 51, figs. 200–201.

Colour: In life pale violet to purple-black or slate-coloured, with legs and antennae dark. Mounted specimens tend to lose their colour and appear pale violet to greyish-violet or dark blackish-violet. Antennae darker violet to grey, becoming dark bluish-violet at joints and on whole of Antennae IV. Legs and furcula pale violet.

Clothing: Of short simple setae and around posterior margin and on dorsal surface of Abds. IV–VI numerous longer, coarsely-ciliated setae in which the cilia become very large towards tips of setae. Some appear to be ciliated on one side only or mainly on one side. Generally whole body shows a rather pock-marked surface, and from each mark a seta arises.

Body: Length 1·2–2 mm. Antennae twice as long as head, four-segmented, segments related as 5: 7: 7: 10. Ocelli on dark pigment patches, eight to each side, six large and two of the inner ones very small. Postantennal organ very large, oval, and double-outlined. Ventral tube short. Abd. III longer than Abd. IV as 12: 10.

Legs: Claw with two small outer lateral teeth about one-third down from base and with two inner teeth, one about centre and the other about three-quarters down inner margin from base. Empodial appendage reaching to second inner tooth, sharply pointed with broad inner and outer lamellae. Inner lamella with prominent tooth at its widest part. Three clavate tenent hairs in line across each foot. A small spine-like seta arises one on each side of claw near base.

Furcula: Manubrium: mucrodens as 10: 31. Dens corrugated and annulated, with two rows of slender simple spines running about half its length and two rows running its full length, each spine arising from a papilla. Mucro with apical tooth, slightly longer sub-apical tooth and a long lateral tooth. Not very clearly separated from dens.

Localities: Aniwaniwa Arm, Lake Waikarenoana, under bark of fuchsia trees and in old logs. In old logs lying on the beaches around Lake Waikaremoana. Lake Waikare-iti Track, under rimu bark; Huiarau Range, 3,200 ft., under bark of rimu trees; Akatarawa, Divide, in rotten log, 1,400 ft.; Butterfly Creek, Wellington, in rotten logs; Maruia Valley, under bark of beech trees.

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Type: Slide 3/518, Dominion Museum Collection.

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Procerura violacea subsp. aequaoculata nov.

This subspecies differs from the typical form in that all the eight ocelli are large and approximately equal in size. The pock-marking on the cuticle generally is not so well marked, and the specimens in the North Island, particularly, are much smaller, being usually in the vicinity of about 0·8 mm. South Island specimens, however, generally equal in size the principal form. The teeth of the foot claw generally are very much reduced in size and very difficult to detect.

Localities: Opepe Bush, Taupo, in old logs; Aniwaniwa Arm, Lake Waikaremoana, in old logs; Maruia Valley, under bark of fuchsia trees and beech trees; Waiho George, under bark of fuchsia trees.

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Type: Slide 3/536, Dominion Museum Collection.

Procerura montana sp. nov. Plate 51, fig. 202.

Although closely allied to P. violacea sp. nov., this form, on account of its mountain habitat and most distinctive coloration, must be classed as a species. In length it reaches 1·8 mm. and in morphological details agrees very closely with the type of P. violacea.

Colour: In life shining purplish-black with light creamy-coloured head. Mounted, head is yellowish, with very dark pruplish-brown pigment around bases of antennae and dorsally extending backwards to middle of head as an equilateral triangle. Thorax and abdomen very deep chocolate to almost purple-black. Legs yellow, furcula brown on manubrium, yellow on dens. Antennae of yellowish ground colour more or less suffused with very dark brown, the yellow showing through mainly around the basal portions of the segments.

The mucro is relatively longer and the empodial appendage shorter than in violacea, with the outer lamellae broader than the inner. Inner lamella reaching only two-thirds down.

Localities: Arthur's Pass, under stones and moss near the summit 3,000 ft., under stones Peg Leg Creek. In leaf debris in beech forest above 2,500 ft.

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Type: Slide 3/547, Dominion Museum Collection.

Procerura purpurea sp. nov. Plate 52, figs. 203–205.

Colour: Head and body of light purple colour with deeper violet along dorsal surface and ventrally on Abds. III, IV, and V. Legs violet. Antennae violet darkening towards apex. Furcula yellowish.

Clothing: Densely clothed with short, close setae and numerous longer, stouter setae, some of which are serrated. Dorsally on Abds. IV, V, and VI some long, curved setae.

Body: Length 1·7 mm. Antennae twice length of head, the four segments related as 7: 10: 10: 12. Ocelli eight to each side, the posterior inner two very small; remainder all large, but the anterior two somewhat separated from others. Postantennal organ oval and double-outlined, about equal to an ocellus in length. Abd. IV slightly longer than Abd. III as 6: 5.

Legs: Similar to P. violacea except that there is only one clavate tenent hair shorter than claw to each foot.

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Furcula: Similar to P. violacea. Mucro surrounded by long setae.

Locality: Tauhara Mountain, Taupo, in bush soil near summit.

Remarks: This species is very similar to P. violacea sp. nov., from which it is distinguished by the different tenent hairs, the arrangement of the ocelli and the bright purplish colouring.

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Type: Slide 3/551, Dominion Museum Collection.

Procerura serrata sp. nov. Plate 52, figs. 206–208.

Colour: Yellow, with very narrow greenish-violet intersegmental bands around posterior margins of all segments. Ventrally a broad greenish-violet stripe running whole length of body. Antennae pale violet, becoming deep bluish-violet on last segment. Legs pale violet, furcula pale yellow. Ocelli on black fields.

Clothing: Of short and long simple setae and on Abd. IV, V, and VI several excessively long, coarsely-serrated setae, serrated on one side only.

Body: Length 1·2 mm. Antennae twice as long as head, the four segments related as 6: 8: 8: 14. Ocelli eight to each side, all large but not equal. Postantennal organ oval, single outlined, and about equal in length to half the diameter of adjacent ocellus. Abd. III to Abd. IV as 10: 8.

Legs: Claw with two outer lateral teeth at about one-third from base. No inner teeth. Empodial appendage longer than half claw, sharply pointed with outer lamellae reaching to tip and broad inner lamella reaching only to about one-third. No tenent hairs.

Furcula: Manubrium to mucrodens as 10: 21. Dens indistinctly annulated towards apex and with at least one row of papillate simple spines running its full length. Mucro with four teeth, three being equal apical and pre-apical teeth, a small exterior lateral tooth, and a very small sub-apical dorsal tooth.

Locality: Waiho Gorge, South Westland, under the bark of Olearia illicifolia trees.

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Type: Slide 3/553, Dominion Museum Collection.

Procerura fasciata sp. nov. Plate 51, figs. 196–199.

Colour: Pale ochreous with suffusion of greyish-violet; a sharply demarcated narrow band of dark greyish violet around posterior margin of every segment followed by a similar very pale ochreous band around anterior margins of each segment. A narrow dark violet stripe along ventral edges of terga and a dark, almost black, middorsal stripe along whole body, including head. Head brownish-ochreous with very pale-violet shading. Antennae greyish-violet darkening on Ant. IV. Legs and furcula greyish-violet near body, becoming pale to clear towards extremities.

Clothing: Of short plain setae with longer plain setae on Abds. III to VI.

Body: Length about 1 mm. Antennae one and a-half times as long as head, the four segments related as 4: 5: 5: 7. Ocelli eight to each side on black fields, six large and two, the posterior inner two, very small. Postantennal organ large and double outlined. Ventral tube long and cylindrical. Abd. III longer than Abd. IV as 9: 7.

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Tenaculum prominent on ventral surface of Abd. III and consisting of two rami arising from corpus, which bears one long curved seta and several smaller ones. Each ramus has four teeth in a row along one edge.

Legs: Claw with two outer lateral teeth and an inner tooth a little past one-third down from claw base. Claw lightly striated on side near centre and with two small setae on each side near base. Empodial appendage about one-third as long as claw with central slightly outwardly-curved rib, very broad inner lamella reaching two-thirds from base and broad outer lamellae reaching to tip. Two non-clavate tenent hairs to each foot.

Furcula: Reaching to ventral tube with four rows of slender papillate spines, two of which reach to mucro and two about two-thirds down. Manubrium to mucrodens as 10: 18. Mucro small and relatively very long, with large apical, larger pre-apical, small dorsal sub-apical, and large exterior lateral teeth. Dens annulated and corrugated, uncorrugated portion 2 ½ times as long as mucro.

Locality: Akatarawa, in bush soil.

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Type: Slide 3/554, Dominion Museum Collection.