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Diplurodes sinecoremata sp. n.  

Diplurodes sinecoremata (paratype)

11-13mm. In facies this species resembles a rather pallid version of decursaria, but with the postmedials in a more basal position, that of the hindwing usually with a broad bluish grey zone between it and the margin over the anterior half of the wing. Males have the broad grey border of the hindwing underside dwindling to a central streak over the posterior third of the wings. Females have it more continuous and are generally more strongly marked on the upperside. In the male abdomen coremata are lacking. The gnathus is typical of the genus. The uncus tapers gently rather than ending in a ‘bird's head’ as in decursaria. The vinculum is distally bilobed as in decursaria. The valve is regular in shape, only slightly sclerotised, and without distinctive ornamentation. The aedeagus apex is unspined but the reflexed vesica bears two basally directed spines near its base.

Holotype . SARAWAK: Gunung Mulu Nat. Park, R.G.S Exped. 1977-8 (J.D. Holloway et al.) Site 25, April, G. Api, 900m, 427550, lower montane forest, BM geometrid slide 10451.

Paratypes. 9 examples SARAWAK as above: 11 February, Camp 1, Mulu, 150m, 385470, mixed dipt. for.; 1 Site 14, February, Camp 2.5, Mulu, 1000m. 413461, lower montane forest; 1 Site 18, March, W. Melinau Gorge, 100m 428563, alluvial forest; 2 Site 23, April, W. Melinau Gorge, 250m. 430558, FEG4, limestone forest; 3 Site 25 as holotype..

Geographical range. Borneo, Sumatra (Sato slide RS-2694).

Habitat preference. The species was taken in lowland dipterocarp and lower montane forests on both G. Mulu and G. Api during the Mulu survey; one specimen is from alluvial forest near the base of G. Api.

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