Abaciscus nasiri Holloway sp. n.

♂♂ 15-16mm. The facies is generally typical of the genus, perhaps most similar to that of the much smaller atmala Swinhoe, but the paler costal zone of the forewing is distinctly deeper just distal from the postmedial, narrowing to the apex and, more gently, towards the base of the wing. There is a sharp contrast in colour within this zone on each side of the postmedial, with a creamy block between it and the medial, and a richer, darker, more rufous colour on its distal side. The male genitalia have a valve shape and ornamentation much as in costimacula Wileman, but there is an irregular process in the centre. The uncus is apically broader, slightly bilobed rather than entire. The aedeagus is more as in paucisignata Warren, though with a group of short spines at the apex rather than a single one.

Holotype ♂

SABAH: Danum Valley, Borneo Rain Forest Lodge, 170m, lowland forest, DAE Rothamsted Trap (Nasir), BM geometrid slide 19913.

Paratypes

3♂♂ as holotype but different dates.

Geographical range

Borneo.

Habitat preference

The specimens are vouchers (species G120) from a Rothamsted light‐trap survey coordinated by H.S. Barlow at the Borneo Rain Forest Lodge in the Danum Valley Conservation Area of Sabah. The trap was set in primary lowland dipterocarp forest at about 170m.

Genitalia: