Heterodontonyx darwinii (Turner, 1910)

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Cryptocheilus darwinii Turner, 1910:318. Type data: type BMNH one male and one female.

Type locality: NT, Darwin.

Elliot, 2007:21 [cat.]

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Figure 5. (a-d) Cryptocheilus darwinii(a) male co-type, dorsal view (b) female holotype,

dorsal view (c) male co-type, lateral view, left side (d) male co-type, head, and fronto-dorsal

view. Scale bars: 1mm. Images a,c,d taken by Xuankun Li

Diagnosis (modified from Turner 1910)

Length 30-40mm; colour black and brown-yellow; body not heavily covered with setae; head of female brown-yellow; head of a male with vertex backward black; pronotum and mesoscutum brown-yellow; propodeum with two distinct tubercles; first metasomal segment black with apical constriction

Female

Colouration. Head brown-yellow; mesosoma black except for tegula, pronotum and mesoscutum which are brown-yellow; tibiae and tarsi brown-yellow, femora black basally, brown-yellow apically; first metasomal segment black, second metasomal segment onwards brown-yellow; wings yellow-orange, with narrow apical and basal darkening. Head. Head. almost the same width as length, TFD/FD = 1.05; posterior ocelli closer to each other than to the compound eye, POL: OOL = 0.77; frons with the median line reaching median ocellus; apical margin of clypeus slightly concave; clypeus rather long, clypeus length: width = 1.25; labrum on same plain as clypeus moderately exposed beneath; malar space very short, almost nonexistent; antenna very long and slender; first flagellar segment slightly longer than the second. Mesosoma. Mesosoma with moderate pubescence; pronotum relatively short, with an obvious median line, its posterior margin strongly angulate; metanotum knobbed; metapostnotum suppressed; propodeum wrinkled across with a median sulcus, tuberculate; spine-bearing dorsal edge of hind tibia moderately serrated; tarsal claws dentate.

Metasoma. Metasoma polished, softly punctate, pygidium covered by short, golden setae, metasoma 1.14x length of mesosoma.

Male

Similar to females except for differences described here: vertex black; clypeus longer; first flagellar segment slightly longer than the second; hind tibiae without serration with short spines; body size slightly smaller.

Figure 5. (a-d) Cryptocheilus darwinii(a) male co-type, dorsal view (b) female holotype,

dorsal view (c) male co-type, lateral view, left side (d) male co-type, head, and fronto-dorsal

view. Scale bars: 1mm. Images a,c,d taken by Xuankun Li

Distribution: NT. New records: QLD

Material examined

Holotype

co-type male (accession number: NHMUK 013380165) and holotype female. The male cotype is pinned on a paper card and in a very good condition. The holotype material is also pinned and is in good condition except for the broken left antennae.