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Peratophyga hypsidesma sp. n

Peratophyga hypsidesma

10-11mm. In facies this species is intermediate between hypsicyma and spilodesma, with the dark areas dull red as in the former and the pale fasciae more regular as in the latter. Males lack a fovea as in hypsicyma. The male genitalia resemble those of hypsicyma in lacking major cornuti in the vesica and having the setal lobes of the uncus shoulder-like and the upper arm of the valves outcurved apically rather than generally sinuous. However, the valves are narrow, tapering, straight rather than deep, apically rounded with a scobinate margin. In the female genitalia the ductus and distal lobes of the bursa are longer than in hypsicyma, the sterigma less strongly sclerotised.

Holotype . SARAWAK: Gunung Mulu Nat. Park, R.G.S Exped. 1977-8 (J.D. Holloway et al.) Site 20, February, Camp 2, G. Mulu, 500m, 401464, mixed dipt. for., BM geometrid slide 12693.

Paratypes: 3 (slide 15828) BRUNEI: 15m. Telisai, Sandy heath forest and Gymnostoma, 3.12.1979 (Lt. Col. M.G. Allen); 3 (slide 15831) BRUNEI: 15m. Daerah Belait, Badas, swamp forest, 25-26 Feb. 82 (Lt. Col. M.G. Allen).

Geographical range. Borneo.

Habitat preference. All specimens are from lowland heath or swamp forests.

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