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Brachydecetia calcarea sp.n.  

Brachydecetia calcarea (holotype)

23mm, wings frayed. The facies is more mottled, less reddish than in rufescens, but with similar oblique dark fasciae. That on the hindwing is present also on the underside whereas in rufescens this is immaculate. Dark postmedial dots are present in the hindwing in a slightly paler blotch, but not in such a long row as in rufescens. However, there are similar dots submarginally near the forewing apex and within a rounded pale blotch at the centre of the triangular area distad to the oblique postmedial. The origin of hindwing vein CuA2 is displaced basad in the male. The male genitalia are characterised by having the uncus divided into two prongs, a broad, rather sinuous valve with a spur on the ventral marginal and a very slender dorsal process. The aedeagus is long, slender, centrally flexed: in the type species it is short, robust, straight. The female genitalia are as in the generic description.

Holotype SARAWAK: Gunung Mulu Nat. Park, R.G.S. Exped. 1977-8 (J.D. Holloway et al.) Site 23, April, Camp 2.5, W. Melinau Gorge, 250m. 430558, FEG 4, limestone forest, BM uraniid slide 226.

Paratype  As holotype but slide 219.

Geographical range. Borneo, Sumatra (ZSM).

Habitat preference. Both specimens were taken in dipterocarp forest at 250m on limestone.

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