Tribe Entomobryini Börner, 1906.
Genus Sinella Brook, 1882.
Pigmentation generally absent; tibio-tarsus on inside surface generally with two rows of long plain setae and claw with single large wing-like basal tooth and sometimes a smaller one also. Tenent hairs if present weak. Scales absent. Ocelli reduced in number or absent.
Three species of this genus are known to occur in New Zealand, and they may be keyed as follows:—
|Mucro falciform.||S. coeca Schött|
|2.||White species with pigment spots on head and thorax.||S. termitum Schött|
|White species with brown bands on all segments except Abd. V. and VI.||S. pulverafusca sp. nov.|
Sinella termitum Schött, 1917. Plate 56, figs. 283–284.
1932. Entomobrya cuniculicola Pritchard.
Colour: White, sometimes with small reddish spots on head and thorax.
Clothing: Of ciliated setae with flexed setae on head and thorax.
Body: Length up to 1 mm. Antennae twice as long as head, four-segmented. Ant. I: II: III: IV as 15: 33: 27: 67. Ant. IV with an apical bristle. Abd. IV from three to four times as long as Abd. III.
Legs: Claw with a small lateral tooth and two unequal basal wing-like teeth. Tenent hairs absent. Empodial appendage with a very large outer wing-like tooth.
Furcula: Manubrium and mucrodens approximately equal in length. Dens annulated and corrugated. Mucro bidentate with basal spine. Uncorrugated portion of dens three times length of mucro.
Localities: This species, originally described from Australia, was first found in New Zealand at Niger Bay, Auckland, where it was taken from burrows of cicadas by Mr. E. D. Pritchard. A further locality is from under bark and moss on tree-trunks in the forest on the Huiaran Range, Urewera Country, at an altitude of about 3,000 ft.
Sinella coeca Schött, 1896. Plate 56, figs. 285–286.
Colour: Entirely white.
Clothing: Close-lying ciliated setae.
Body: Length up to 2 mm. Ocelli absent. Claws with two basal wing-like teeth and a strong inner tooth. Empodial appendage, with outer wing-like tooth. Mucro falciform with basal spine.
Locality: This cosmopolitan species was reported from Manurewa, Auckland, by Womersley in 1934.
Colour: White with patches of granular chestnut-brown pigment on top and sides of head and broad transverse bands around all segments except Abd. V and Abd. VI. Posterior three-quarters of Abd. IV, brown. Legs, furcula, and antennae, white.
Clothing: Sparsely clothed along dorsal surface of head and thorax with many long flexed setae. Tip of abdomen, furcula, legs and antennae clothed with ciliated setae. Very short ciliated setae occur on body. Bothriotrichia present on Abd. III and on Abd. IV.
Body: Length up to 1·5 mm. Antennae two and a-half times length of head, the four segments related as 7: 10: 10: 20. Ocelli absent. Abd. IV three and a-half times as long as Abd. III. Ventral tube long and thin, swollen distally.
Legs: Claw with a pair of large basal wing-like teeth half as long as claw and a prominent inner tooth about one-quarter down. No outer teeth. A single short tenent hair about half as long as claw to each foot. Empodial appendage more than half as long as claw, truncate on inner margin, and with a broad outer wing-like tooth.
Furcula: Manubrium to mucrodens as 22: 27. Dens corrugated and annulated. Mucro bidentate with basal spine, apical tooth larger than pre-apical and elongate so that the two are well separated. Mucro surrounded by strongly-ciliated setae. Uncorrugated portion of dens twice as long as mucro.
Localities: Lake Brunner, under white pine bark and in bush soil and debris; Rocky Creek, Weheka, under stones; Lindis Pass, South Canterbury; under stones by a stream, and Arthur's Pass, under stones and moss, 3,000 ft.
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Type: Slide 3/646 and Figured Paratype: Slide 3/647, Dominion Museum Collection.