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Dasyboarmia pilosissima sp. n

Dasyboarmia pilosissima (paratype)

21-22mm. The upperside facies is much as in isorrhopa but the pale hindwing submarginal is somewhat more prominent. The major differences are on the underside where postmedial fasciae, conspicuous in isorrhopa, are absent, but the hindwing is completely covered in a rich chocolate coloured pilosity. In the genitalia the uncus is longer than the gnathus, spatulate, the right costa! process of the valve tapering rather than rectangular, and the left costa! process more strongly curved. The distal cornuti of the aedeagus vesica are fewer, shorter.

Holotype . BRUNEI: 1618m Bukit Retak, montane forest, 19.5.79. (Lt. Col. M.G. Allen) BM geometrid slide 12710.

Paratypes: 2 as holotype, different dates; 1 BRUNEI: 1670m, Bukit Pagon, montane forest, Feb 1982, (Allen & Harman); 1 SARAWAK: Gunung Mulu Nat. Park, R.G.S Exped. 1977-8 (J.D. Holloway et al.) Site 2, January, Camp 4, Mulu, 1790m, 452463, [upper montane (moss) forest].

Geographical range. Borneo.

Habitat preference. The records are all from upper montane forest on a group of mountains in Brunei and the neighbouring part of Sarawak.

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