Bocana longicornis Holloway sp. n.

Diagnosis

♂♂, ♀♀ 17-18mm. This is a consistently larger species than silenusalis (14-16mm) but with similarly long antennae. Its wings are brownish rather than blackish, with the forewing white discal patch of silenusalis mostly obscured on both upper- and underside. The features of the male abdomen are indistinguishable, however. The species is also similar to B. umbrina Tams 107 (Thailand, N.E. Himalaya), but that species is smaller, a richer, slightly paler brown, somewhat more variegated, particularly on either side of the forewing submarginal subapically (darker on the basal side) and in a paler zone distal to the hindwing postmedial.

Holotype ♂

Kina Balu, N. BORNEO, BM noctuid slide 19513.

Paratypes

• 4 ♂♂, 2 ♀♀ Kina Balu
• 1 ♂, Kina Balu, ex Staudinger, 1890
• 4 ♂♂ NORD BORNEO: Mont Kina Balu, 5-8.1903 (John Waterstradt)
• 1 ♂ SARAWAK: Gunong Mulu Nat. Park, R.G.S. Exped. 1977-8 (J.D. Holloway et al.), G. Mulu, 500m, 401464, to camp [2] lights, 20.2.1978.

Geographical range

Borneo.

Habitat preference

Most material is from the vicinity of G. Kinabalu but without precise data. A female was taken at a pressure lamp in a camp at 500m in hill dipterocarp forest on G. Mulu.

Genitalia: