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.; 1Site 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.
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.