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Volume 70, 1940-41
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Genus Lepidocyrtus Bourlet, 1839.

Body scaled, the scales rounded and hyaline, with almost invisible striations. Ocelli, eight to each side. Clavate tenent hairs well-developed. Mucro bidentate, with basal spine. Dentes scaled but without spines.

Eight species belonging to this genus occur in New Zealand and of these six are endemic, one is Australian, and the other North American.

key to the new zealand species of lepidocyrtus.
1. deep blue to blue-violet. claw with two inner teeth and two outer basal teeth. l. lindensis sp. nov.
species otherwise. 2
2. light-coloured species of uniform colour except for 2–3 lateral dark-coloured spots. 3
with transverse segmental bands. 4
3. yellow, with one large indigo-blue spot on each side of abd. iii, and one on each side of abd. iv. l. submontanus sp. nov.
yellow with one large elongate dark blue mark on each side of abd. iv and a similar but very much smaller mark on each side of abd. v. l. moorei sp. nov.
4. with one broad transverse band; claw without inner teeth. 5
with several transverse bands; claw with outer and inner teeth. 6
5. thorax and first three abdominal segments deep blue, remainder of body yellow. claw with exterior lateral teeth only. l. nigrofasciatus womersley
entirely blue except for sides of the head and a broad yellow band around abd. iv. claws without any teeth. l. unafascia sp. nov.
6. yellow species with violet bands around abds. ii, iv, and v. abd. iii wholly violet. l. ratacnsis sp. nov.
ochreous to pale violet species with dark violet posterior bands around all segments except abd. iv. l. kauriensis sp. nov.
purple pigmented species with yellowish inter-segmental bands on all segments. l. cyaneus subsp. cinereus folsom

Lepidocyrtus lindensis sp. nov. Plate 61, figs. 358–360.

Colour: Mounted specimens, head and trunk deep blue to blue-violet, with a single patch of pale violet to ochreous around posterior dorsal and lateral areas of the head. First two segments of the antennae pale ochreous-violet, third deep violet, and fourth deep blue. Deep pigmentation around antennal joints. Proximal segments of legs deep blue to violet, distal segments pale ochreous. Furcula pale ochreous-brown. The whole cuticle coarsely granular. In some specimens it has the appearance of dried mud which has been baked by the sun and become traversed by myriads of fine cracks.

Clothing: Of hyaline scales and numerous short setae. Tufts of short setae occur along dorsal surface of thorax and at apex of mesothoracic tergum. Many medium to long ciliated setae around posterior region. Antennae thickly clothed with setae, some of which

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are ciliated, those of the first three segments long, those of the fourth much shorter. Legs and furcula scaled, the latter heavily, and both with long plain and long ciliated setae.

Body: Length 0·5–1·2 mm. Tergum of mesothorax completely covers prothorax. Head long and narrow, being about two and a-half times as long as it is deep, flexed downwards, and slightly longer than the mesothoracic tergum. Antennae four-segmented, the segments related as 3: 5: 4: 9. Ocelli, eight on each side, all equal. Ventral tube short and fat. Abdomen IV 4–5 times as long as Abd. III.

Legs: Claw with two teeth spaced close together about three-quarters down from claw base and a pair of outer basal teeth. Empodial appendage long, narrow, lanceolate, reaching to first tooth. A single clavate tenent hair to each foot.

Furcula: Reaching forward to ventral tube. Manubrium slightly longer than mucrodens. Dens corrugated and annulated. Mucro bidentate, with basal spine, the apical tooth long, but the pre-apical tooth longer. Typically several long ciliated setae surround each mucro and scales occur down to tip of dens.

Localities: Amongst grass near beach Mount Maunganui, Tauranga; Lindis Pass, South Canterbury, under stones amongst tussock near streams.

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Type: Slide 3/174, Dominion Museum Collection.

Lepidocyrtus submontanus sp. nov. Plate 62, figs. 361–363.

Colour: Yellow, with one large indigo-blue spot on each side of Abd. III, and one on each side of Abd. IV. Ocelli on blackish fields joined by a brownish-black line across front of head. Posterior border of Abd. V dark brown. Ant. I yellow, II and III pale violet, IV dark bluish-violet. Furcula yellow. Legs yellow with broad pale violet bands. Irregular pale brown mottling occurs along lower half of sides of body.

Clothing: Heavily scaled with almost invisible scales and occasional ciliated setae, tufts of setae at the apex of the mesotergum, and at the tip of the abdomen. Legs and furcula heavily clothed with ciliated setae.

Body: Length up to 1·3 mm. Antennae twice as long as head, the segments related as 6: 15: 10: 19. Ocelli, eight to each side, the posterior inner pair very small, remainder all large. Segmentation rather indistinct. Abd. IV four times longer than Abd. III.

Legs: Claw with a pair of inner teeth at one-quarter and a distal tooth at three-quarters. No external teeth. Empodial appendage truncated on inner margin and about two-thirds as long as claw. A single clavate tenent hair slightly shorter than claw to each foot.

Furcula: Manubrium and dens equal in length. Dens strongly annulated and corrugated, the uncorrugated part 2 ½ times as long as mucro. Mucro bidentate with basal spine, the two teeth being equal. Mucro over-reached by long, strongly ciliated setae.

Locality: Otira Gorge, 2,800 ft., amongst leaf debris.

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Type: Slide 3/747, Dominion Museum Collection.

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Lepidocyrtus moorei sp. nov. Plate 62, figs. 364–366.

Colour: Yellow with one large dark blue elongate triangular mark on each side of Abd. IV and another similar but very much smaller mark on each side of Abd. V. A small dark dot on the posterior ventral corner of Abd. IV. A dark line joins the ocellar fields across front of the head. Ocellar fields dark brown. Anetennae violet, darkening towards apex. Legs and furcula yellow, with tibio-tarsi violet.

Clothing: A few short ciliated setae around tip of abdomen. Ciliated setae on furcula. Setae of the legs plain. Scales visible only when seen edge on.

Body: Length 1·7 mm. Antennae four-segmented, twice as long as head. Ant. I: II: III: IV as 7: 13: 10: 17. Ocelli, eight to each side, six large and the posterior inner two smaller. Ventral tube long. Mesotergum completely covers prothorax but does not overlie the head. Abd. IV seven times longer than Abd. III.

Legs: Claw with two strong outer lateral basal teeth, and three inner teeth, being a pair at one-third and a large single tooth at three-quarters. Empodial appendage half as long as claw, truncate on inner margin. No tenent hairs.

Furcula: Manubrium distinctly longer than dens. Dens annulated and corrugated, the uncorrugated portion one-third longer than mucro. Mucro bidentate with basal spine, the apical tooth very much smaller than the pre-apical.

Locality: Hay's Bush, Banks Peninsula, in old stump; from a collection kindly sent to me by Mr. E. W. Moore, of Christchurch, after whom I have much pleasure in naming it.

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Type: Slide 3/749, Dominion Museum Collection.

At present known only from the type specimen.

Lepidocyrtus nigrofasciatus Womersley, 1934. Plate 62, figs. 367–368.

Colour: Yellow, with deep blue pigment covering thorax and first three abdominal segments. Antennae and basal leg segments blue.

Clothing: Body densely scaled and clothed with short setae.

Body: Length 0·9 mm. Antennae equal to head in length, the segments related as 12: 15: 15: 26. Abd. IV 8 times longer than Abd. III.

Legs: In his original description Womersley stated that the claws have exterior lateral teeth only. However, in the specimens sent to me there is a pair of large inner teeth at centre and a large single tooth at three-quarters. Empodial appendage about half as long as claw and apically truncate. Clavate tenent hair shorter than claw.

Furcula: Long, manubrium longer than dens. Mucro bidentate with basal lateral spine. The pre-apical tooth considerably larger than the apical.

Locality: This Australian species was reported by Womersley in 1936 from Davies Bush, Manurewa, Auckland, but it has not been found elsewhere.

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Lepidocyrtus cyaneus Tullberg, subspecies cinereus Folsom, 1924. Plate 62, fig. 369.

Colour: With scales, metallic grey. Without scales, white to orange, with broad bands of purple pigment around all segments but having the intersegmental margins clear. The mesonotum edged with black. Streaks and spots of yellow occur throughout the purple pigment. Antennae purple. Legs and furcula white or yellow.

Clothing: Densely scaled. Flexed setae around apex of the mesotergum. Bothriotrichia on Abds. II and IV. Short ciliated setae on antennae, legs, and furcula.

Body: Length 1·1 mm. Antennae slightly longer than head. Ocelli, eight to each side. Mesotergum completely covering prothorax.

Legs: Claw with a pair of large external lateral basal teeth and two pairs of inner teeth at centre and two-thirds respectively. Empodial appendage two-thirds as long as claw and lanceolate. A short, clavate tenent hair to each foot.

Furcula: Dentes and manubrium sub-equal in length. Dens corrugated, the uncorrugated portion three times length of mucro. Mucro bidentate with basal spine, the apical and pre-apical teeth equal.

Localities: Originally, this species was described by Folsom from North America. I have discovered it in New Zealand at Paiahia in debris under manuka scrub, and at Mount Manganui, Tauranga, amongst pine needles and amongst grass on the sandhills.

Lepidocyrtus unafascia sp. nov. Plate 62, figs. 370–372.

Colour: In life, irridescent bluish-grey. Mounted, entirely blue except for sides of head and a broad band around anterior margin of Abd. IV, which are yellow. Antennae blue, legs blue basally, yellow distally. Furcula yellow. The blue anterior to Abd. IV is deeper that that posteriorly. There is a suggestion of yellow showing through the blue on Abd. V. Clothing of scales, with occasional setae posteriorly and on legs, antennae, and furcula.

Body: Length up to 0·75 mm. Antennae approximately equal to head in length, the four segments related as 12: 20: 18: 30. Ocelli, eight to each side, all equal. Abd. IV three times longer than Abd. III. Mesothorax 2 ½ times longer than metathorax and completely covering prothorax. Ventral tube short.

Legs: Claw entirely without teeth. Empodial appendage almost as long as claw, sharply truncate on inner margin and with a broad inner lamella. Tenent hair half as long as claw, and not clavate.

Furcula: Reaching to thorax. Manubrium longer than mucrodens as 75: 60. Dens annulated and weakly corrugated, the uncorrugated portion twice as long as mucro. Mucro very elongated, with long apical tooth, slightly larger pre-apical tooth and basal spine.

Remarks: Superficially this species resembles very closely L. cyaneus cinereus Folsom, from which it differs in the structure of the feet and mucro.

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Localities: Lewis Pass Saddle, 3,100 ft., amongst leaf debris in forest; Maruia Valley, under stones; Maruia Saddle, 1,900 ft., amongst leaf debris in forest; Waiho Gorge, South Westland, under the bark of Olearia illicifolia; Lake Brunner, in bush debris.

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Type: Slide 3/740, Dominion Museum Collection.

Lepidocyrtus kauriensis sp. nov. Plate 62, figs. 373–375.

Colour: Body ochreous to pale violet, with deep violet edge to thorax. Narrow violet intersegmental bands on posterior margins of mesothorax, metathorax, and Abd. I, with similar but broader bands on Abds. II and III. Abd. V and VI violet. Legs and furcula ochreous, with tibio-tarsi a deep blue-violet. Ant. I and II violet, III and IV deep violet. Ocelli on dark violet fields. Sides of the head pale violet.

Clothing: Of hyaline, almost invisible scales. Long ciliated setae occur around Abds. V and VI. Flexed setae occur dorsally on head and thorax, plain setae on the legs and first three antennal segments, Ant. IV with short ciliated setae. From four to six serrated setae on inner edge of each tibio-tarsus.

Body: Length 1 mm. Antennae twice length of head, the four segments related as 6: 8: 8: 12. Ocelli, eight to each side, the posterior inner two being very small and remainder all large. Ventral tube long. Abd. IV three times longer than Abd. III.

Legs: Claw with two long outer basal teeth and four inner teeth, there being one pair at centre, a single long tooth at three-quarters and a further well-defined but smaller distal tooth midway between this and the apex. Empodial appendage parallel-sided and truncate on inner margin; about half as long as claw on front and middle feet, but three-quarters as long on hind feet. A single clavate tenent hair as long as claw to each foot.

Furcula: Manubrium and mucrodens almost equal in length. The dens strongly annulated and corrugated, the uncorrugated portion three times as long as the mucro. Mucro bidentate with basal spine; the two teeth equal, but the pre-apical with a slight return slope. Mucro surrounded with strongly ciliated setae.

Locality: Waipoua Kauri Forest, on the bark of kauri trees.

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Type: Slide 3/735, Dominion Museum Collection.

Lepidocyrtus rataensis sp. nov. Plate 62, figs. 376–377; Plate 63, fig. 378.

Colour: Pale yellow, with violet edging to mesothorax, both anteriorly and laterally, continued as a lateral line on to Abd. II. Posterior half of Abd. II bordered with violet. Abd. III wholly violet dorsally. Abd. IV with broad pale violet band posteriorly and violet pigmentation along sides. Abd. V with violet band on posterior half. Furcula pale yellow. Legs pale yellow with violet tibio-tarsi. Ant. I and II pale violet, III and IV deep violet.

Clothing: Of hyaline scales and short ciliated setae. Some very long ciliated setae around Abds. IV–VI and on the legs. Flexed setae occur dorsally on thorax and on top of head. Very long bothriotrichia occur dorsally, one on each of Abds. II, III, and IV.

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Body: Length 1·1 mm. Antennae twice as long as head, the segments related as 6: 10: 8: 12. Ocelli, eight to each side, posterior inner two very small, remaining six all large. Abd. IV five times longer than III.

Legs: Claw with outer tooth, two long outer basal lateral teeth, and four inner teeth—a pair at about one-third, a large single tooth at three-quarters, and a smaller distal tooth. A well-developed clavate tenent hair as long as claw to each foot. Empodial appendage half as long as claw, parallel-sided and lanceolate.

Furcula: Dens annulated and corrugated, the uncorrugated portion three times length of mucro. Mucro bidentate with basal spine, apical tooth much smaller than pre-apical. Mucro surrounded and over-reached by long strongly-ciliated setae.

Locality: Weheka, under the bark of rata trees.

Remarks: This is one of the few occasions on which I have ever found Collembola associated with rata trees.

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Type: Slide 3/738, Dominion Museum Collection.