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Parasynegia sundastriaria sp. n.

Parasynegia sundastriaria

18-20mm. This species, along with the type species and diffusaria, has the discal spots large, that of the forewing pale-centred. The dark ring to the pale centre is variable thick, diffuse, as in diffusaria, rather than narrow, fine as in pluristriaria where the pale centre is larger and more elliptical. The fasciae are finer and more clearly etched than in diffusaria though not as regular and linear as in pluristriaria.

The male genitalia are distinguished by: the broad, triangular, basal process to the valve (digitate in pluristriaria, very small in diffusaria); the large spatulate distal process (asymmetrically double in pluristriaria, digitate in diffusaria); the large, straight apical spine to the aedeagus (broader, shorter with a second smaller one opposite in diffusaria).

Holotype . SARAWAK: Gunung Mulu Nat. Park, R.G.S Exped. 1977-8 (J.D. Holloway et al.) Site 23 April, W. Melinau Gorge, 250m, 430558, FEG4, limestone forest, BM geometrid slide 12984.

Paratypes: 1, 1 (slide 12986) general data as holotype but Site 8 [Camp 1, G. Mulu 150m, dipterocarp forest] and Site 28 [alluvial forest near Long Pala, 50m, FEG 1]; 1 BORNEO; 1 Bidi SARAWAK, 1907-1908 (C.J. Brooks); 1 Kuching [SARAWAK] 1899; 1 SARAWAK, O.U. Far East Exp. 6.ix.1981, Santubong Mt, BM geometrid slide 16503.

Geographical range. Borneo, Sumatra.

Habitat preference. All material is from lowland forest localities.

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