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Volume 70, 1940-41
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Genus Xenylla Tullberg, 1869.

Ocelli present, four or five on each side. Postantennal organ absent. Empodial appendage absent. Furcula present but generally reduced. Anal spines present, generally two, and very small.

Two species belonging to this genus occur in New Zealand. One of these is endemic and the other exotic.

Key to the New Zealand Species of Xenylla.
1. Claw without any teeth and with only one clavate tenent hair X. maritima Tullberg.
2. Claw with one inner tooth and two clavate tenent hairs X. nova-zealandia sp. nov.

Xenylla maritima Tullberg, 1869. Plate 40, figs. 14–18.

Colour: Bluish-grey.

Clothing: Lightly clothed with short curved plain setae.

Body: Length 1–1·5 mm. Antennae shorter than head. Ant. IV with apical knob and four sensory setae. Sensory organ on Ant. III consisting of two sense clubs behind an integumental fold. Ocelli five to each side, all large, and on dark pigment patches. Anal spines small and on very broad papillae.

Legs: Claw without any teeth. Generally one well developed clavate tenent hair to each foot, sometimes increased to two on middle and hind feet.

Furcula: Dens and mucro indistinctly separated. Dens with two strong setae. Mucro with upturned terminal tooth and narrow inner lamella.

Locality: Kumara, collected by Mr Campbell and sent to me for inclusion in this paper by Mr Womersley, of the South Australian Museum. Not necessarily a maritime species though called “maritima.”

Xenylla nova-zealandia sp. nov. Plate 39, figs. 8–12.

Colour: In life a deep blue-black. Mounted, a deep violet-blue on the body and all the appendages.

Body: Length up to 1 mm. Sparsely clothed on body, legs, and antennae, with short setae which are most numerous around tip of abdomen. Head related to thorax as 15:25. Antennae shorter than head, four-segmented, segments related as 14:13:14:25. First two segments broader than long. Sensory pit at tip of Ant. IV. No sign of sense organ on Ant. III. Antennae lightly clothed with short, stout setae. Ocelli five to each side on dark pigment patches. Ventral tube very short and dome-like. Abd. IV to Abd. III as 8:6. There are two very small spines on minute papillae on dorsal extremity of Abd. VI.

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Legs: Claw long, slightly curved and sharply pointed, with single very small inner tooth at about two-thirds. No outer teeth. Empodial appendage absent. Two long, finely-clavate tenent hairs longer than claw to each foot.

Furcula: Very small, not reaching to ventral tube. Dens and mucro indistinctly separated; mucro elongate and tapering, slightly upturned apically and truncated. A very narrow dorsal lamella, and a row of circular wart-like marks extends along side of mucro. Dens finely crenulated dorsally. No ventral setae but a long curved dorsal seta arises near commencement of mucro. Manubrium stout, dens and mucro slender. Manubrium to dens to mucro as 34:16:8.

Localities: Lake Monowai, under the bark of manuka trees on the river bank. Mount Manganui, Tauranga, in grass.

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Type: Slide 3/245 Dominion Museum Collection.