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Corymica arnearia Walker
Corymica arnearia Walker, 1860, List Specimens lepid. Insects Colln Br. Mus. 20: 231.

Corymica arnearia

Larvae of Corymica arnearia

This and the next species appear very similar from the upperside but arnearia tends to have a more clearly marked medial bar on the forewing dorsum, pale, red edged as distinct from diffusely red, and a corresponding narrow mark on the costa that is absent in vesicularia. The red marginal mark on the forewing underside is usually much broader in arnearia, quadrate, rather than dentate to triangular. In the male genitalia arnearia has the apex of the valve distinctly hooked at the costa and has a distinctive central pucker. The valve in vesicularia is simple, elliptical. The aedeagus is stout in arnearia, with a scobinate lateral lobe to the vesica, rather than very slender.

Geographical range. Japan, Oriental tropics to Sulawesi.

Habitat preference. The species was described from Borneo, and there is a further specimen from Sarawak; all Bornean material was collected by A.R. Wallace, probably from lowland localities.

Biology. The species has been reared in Hong Kong by M.J. Bascombe (pers. comm.). The larva (above) is bright green with a paler, yellower venter. The head is brown with a pair of black stripes and dorsal white rings.

The host-plant was Cinnamomum camphora (Lauraceae). The resting posture of the adult is typical of the genus.

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