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Diomea nigrisuffusa sp. n.
16, 17mm. This species is a similar size to lignicolora and eupsema, but more of a blackish brown, with a crenate and somewhat broken, punctate darker postmedial on all wings. This has paler highlights at its distal side on the hindwing, whereas on the forewing the pale submarginal is separate from it, somewhat stepped subdorsally and subcostally. The male genitalia are very similar to those of the previous two species but have more extensive setose ridging and lobing between the base of the saccular process and the costa; in eupsema the setose lobe is much smaller and between a ridge and the saccular process rather than on the costal side of the ridge; lignicolora is similar to eupsema but the lobe is much longer, shallower, less clearly defined.

Diomea nigrisuffusa

. SARAWAK: Gunong Mulu Nat. Park, R.G.S. Exped. 1977-8 (J.D.Holloway et al.), Site 25, April, G. Api, 900m, 427550, lower montane forest, BM noctuid slide 18539.

Paratypes . General data as holotype but Site 14, February, Camp 2.5, Mulu, 1000m. 413461, lower montane for., BM noctuid slide 18164 (specimen is worn).

Geographical range. Borneo, Sulawesi (slide 18776).

Habitat preference. Both specimens are from lower montane forest.

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