Chilkasa falcata Swinhoe

Chilkasa falcata Swinhoe, 1885, Proc. zool. Soc. Lond

Diagnosis

There is strong sexual dimorphism but the sexes share distinctly falcate forewings and darker postmedial fasciae that divide off the distal third of all wings. The male has the forewing apex more produced but less falcate and the secondary angle of the margin is reduced relative to that of the female. The hindwing margin is angled in the female, but not in the male. The female is a uniform brownish grey whereas the male is paler than this basal to the fasciae and darker distal to them. The male forelegs are strikingly tufted with pale yellow and brownish scales.

Biology

Gardner (1947) described the larva. It is green, with the prolegs on A3 and A4 strongly reduced, those on A4 slightly larger. No details were given of the pupa, and the host plant was not identified.

Genitalia: