Arctornis mallephrika Holloway sp. n.

♂♂ 11-14mm. In facies this species is very similar to phrika, though the satiny rippling of the forewing is more even, finer, without the broader zone postmedially. The head and palps are more rufous, the latter paler, and the legs lack spots. The species differs markedly in the male genitalia: the uncus is laterally expanded; the valves are much broader distally, less tapered; the process on the right valve is short, broad, hammer-like.

Holotype ♂

Ulu Temburong Expedition 1978, BRUNEI: Base Camp, 300m, m.v. light, 10.x.1978 (T.W. Harman) BM lymantiid slide 2116.

Paratypes

• 1 ♂ (slide 2113) BORNEO: Sabah, Danum Valley, 5° 01N, 117’ 47E, 26.ix.1987, 100m, (A.H. Kirk-Spriggs)
• 1 ♂ bORNEO: Sabah, Bukit Monkobo, 5° 48N, 116’ 58E, 9.viii.1987, 900m, stunted hill forest (A.H. Kirk-Spriggs)
• 1 ♂ BRUNEI: 300m, Ulu Temburong, rain forest, 30.6.1979 (Lt. Col. M.G. Allen)
• 7 ♂♂ SARAWAK: Gunung Mulu Nat. Park, R.G.S. Exped. 1977-8 (J.D. Holloway et al.)Site 8, (3
• slide 1644) February, Camp 1, Mulu, 150m, Site 13 (3
• slides 1608, 1650), February, Camp 2, Mulu, 500m, and Site 23 (1) April, W. Melinau Gorge, 250m, forest on limestone.

Geographical range

Borneo, Sumatra (Schintlmeister, MS).

Habitat preference

All specimens have been taken in lowland forest except for one from 900m in stunted hill forest on Bukit Monkobo.

Genitalia: