Thoyowpongia nigrodiscus Holloway sp. n.

♂♂ 12-18mm. See the generic description for diagnosis.

Holotype ♂

*BRUNEI: 300m, Ulu Temburong, rainforest, 28.4.81 (Lt. Col. M.G. Allen).

Paratypes

• 1 ♂ as holotype
• 2 ♂♂ BRUNEI: 15m, Telisai, sandy heath forest and Gymnostoma, 1979 (Lt. Col. M.G. Allen), BM geometrid slide 10417
• 1 ♂ BRUNEI: 1618m, Bukit Retak, montane forest, 14.9.1979 (Lt. Col. M.G. Allen)
• 3 ♂♂ SARAWAK: Santubong Mt., 300m 10.ix. 1981 (Oxford Far East Exp.) BM 1981-493.

Geographical range

Borneo, Sumatra, Peninsular Malaysia (FRIM collection).

Habitat preference

Most specimens are from lowland forest, two from dry heath forest, and one from montane forest.

Genitalia: