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Strepsigonia robusta sp. n

Strepsigonia robusta (paratype)

Strepsigonia robusta (holotype)

14-17mm, (Peninsular Malaysia) 21mm. The general buff colour and fasciation of the wings are as in other Strepsigonia, but the species is much larger, more robust, and variably suffused with darker brown and black, leading in some specimens to longitudinal rays of pale and dark in the forewing costal zone. The forewing tornus is diagnostically excavate, and the angling of the rather triangular hindwing margin at vein M1 is also distinctive (the angle is just anterior to CuA1 in affinis). The underside is more ochreous, with conspicuous blackish postmedials, oblique on the forewing and curved or angled on the hindwing. The seventh and eighth sternites of the male are modified symmetrically. The genitalia are of the Strepsigonia type but the lobes of each uncus component are broad, equal, the inner ones closer together than in other species. The gnathus is apically bilobed, spined. The valves are small, narrow, apically trilobed. The aedeagus vesica contains two clusters of spines and is basally ringed with scobination.

Holotype . SARAWAK: Gunung Mulu Nat. Park, R.G.S. Exped. 1977-8 (J.D. Holloway et al.) Site 13, February, Camp 2, Mulu, 500m. 401464, mixed dipt. forest.

Paratypes: las holotype; 1 general data as holotype but Site 8, February, Camp 1, Mulu, 150m, 385470, mixed dipt. for.; 2  (slide 2093) same general data as holotype but Site 23, April, W. Melinau Gorge, 250m 430558, FEG 4, limestone forest; 1 same general data but Site 25, April, G. Api, 900m 427550, lower montane forest; l BRUNEI: 300m, Ulu Temburong rainforest, 20 July 79 (Lt. Col. M.G. Allen); 2 BRUNEI: 3m, Seria, secondary and coastal veg. 20.11.79 (Lt. Col. M.G. Allen); 1 BORNEO: Sabah, Danum Valley 5.01N, 117.47E, 20.x.1987, 100m (A.H. Kirk-Spriggs) primary forest edge.

Geographical range. Borneo, Sumatra (ZSM), Peninsular Malaysia.

Habitat preference. The species is uncommon in lowland forest, including coastal and secondary forest, with one specimen from lower montane forest on limestone.

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