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Bornethosea
Gen. n.
Type species: nigrina sp. n.
The forewing shape is reminiscent of that of the previous two genera but
vein M1 arises from the base of R5 at the cell rather than
well separated from it. The bipectinations of the male antennae are basally
narrower and taper away evenly towards the apex. The palps are directed
forwards, appearing rectangular when viewed laterally, and with the third
segment obscure; in these features they resemble those of the crescent-signum
group.
The insect is shades of grey to black, the forewings with a basally
diffuse, distally sharp blackish submarginal that curves gently from subapically
on the costa to meet the margin just subtornally. The forelegs have the apex of
the coxa white and a small white patch at the tip of the tibia, features that
again may indicate association with the crescent-signum group.
The male genitalia are of unmodified ground plan type apart from a pair
of unequal spines at the apex of the aedeagus.
Females are unknown.
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