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Volume 70, 1940-41
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Genus Dinaphorura Bagnall, 1935.

Sensory organ of Ant. III with three sense clubs, protected by cuticular fold. Ant. IV apically with two sensory knobs. Pseudocelli present. Abd. VI with at least seven spine-like processes.

Represented in New Zealand by two endemic species.

Key to the New Zealand Species of Dinaphorura.
1. Abd. VI with nine different-sized spines. D. novae-zealandiae Womersley
2. Abd. VI with two large anal horns and nine equal-sized spines. D. laterospina sp. nov.

Dinaphorura novae-zealandiae Womersley, 1935. Plate 48, fig. 131.

In the original description of this species by Womersley no specific locality is given; but the material came from the vicinity of Christchurch. In his later publication on the “Primitive Insects of South Australia,” this species is again referred to and mis-spelt “D. novae-hollandiae” and “D. novae-hollandae.”

I have not, so far, come across this insect; but the following brief description is taken from Mr Womersley's original:—

Colour: White.

Clothing: Sparsely clothed with long spine-like setae.

Body: Length 0·9 mm. Antennae as long as head. Ant. I: II: III: IV as 10: 10: 10: 15. Ant. IV with sensory organ at one-third from apex composed of a pair of stout curved rods and a guard seta behind a cuticular fold. Post-antennal organ with about 20 inclined, adpressed lobes. Anal spines nine, as follows:—A pair of strong, posterior, normal anal spines on stout papillae, the spines plus

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papillae half as long again as the claws; an anterior row of four blunt, stout, spine-like processes, the middle pair of which are smaller than the lateral ones. Between this row and the posterior spines is a small process on each side; and ventrally between the posterior spines is another small process. Pseudocelli large, arranged as follows:—One on each antennal base, a pair on the back of the head, and a pair on each thoracic and abdominal segment to V.

Dinaphorura laterospina sp. nov. Plate 48, figs. 132–136.

Colour: White.

Clothing: Sparsely clothed with short, plain setae, which are longer around the tip of the abdomen.

Body: Length 1·4 mm. Antennae equal in length to head, the four segments being related to one another as 12: 17: 12: 23. Ant. IV with strong apical seta and many long sensory setae. A sensory organ midway along Ant. IV on ventral side consists of two smooth inwardly-curved sense clubs and two sense rods behind a curved cuticular lip. A very small apical exertile knob and a second similar knob just below apex of Ant. IV. Ocelli absent. A single pseudocellus at base of each antenna, one on each side of the back of the head and from Th. II to Abd. V one on each side of each segment. On Abd. VI two large curved anal horns on papillae, horns plus papillae being one and a-half times length of hind claw. Abd. VI also bears nine short fat spines arranged as follows:—One median ventral below and between anal horns; one on outside of and slightly anterior to each anal horn; and anteriorly to anal horns a transverse row of six equal-sized spines, two of which are lateral, the remaining four arranged as two pairs, one pair being in front of each anal horn. Post-antennal organ curved and containing about thirty inclined tubercles. The head indistinctly separated from the thorax and tapering anteriorly with antennae inserted on extreme front.

Legs: Claw with no teeth and empodial appendage rudimentary on middle and hind feet; absent from front feet.

Locality: Falls Creek, Hollyford Valley, amongst very wet leaf mould in the bush in the immediate vicinity of the falls.

Type: Slide ¾26, Dominion Museum Collection.