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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
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Diagnosis. 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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