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Lophoptera chalybea Walker
Gadirtha chalybea Walker, 1864, J. Linn. Soc. Lond., Zool. 7: 161.
Lophoptera chalybea Walker; Holloway, 1976: 19.

Lophoptera chalybea

Lophoptera chalybea

This and the next species are very similar externally but the sub-basal line of the forewing in chalybea is more irregular, wavy; the apical pale mark has its larger, posterior element diffusing away basad rather than being contained by a black, sagittate mark (polygrapha) or lunule (khasiana). The valves of the male genitalia are stepped subapically on the costal margin, relatively narrow, rather than oval, balloon-like as in polygrapha.

There is a form with rather more uniform forewings and a basal pale fawn blotch (illustrated).

Geographical range. Borneo, Sumatra, Sulawesi.

Habitat preference. All records have been from upper montane forest: on G. Kinabalu, on G. Mulu, G. Api and G. Murud in Sarawak, and on Bukit Retak in Brunei.

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