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Gelastocera
Butler
Type
species: exusta
Butler, Japan.
The forewings are brown, transversely fasciated as described below, and without
any distinctive modification to their shape. The valves of the male genitalia
broaden distally. The aedeagus vesica is undivided, with one or two clusters of
short spines.
The female genitalia (exusta) have a colliculum at the base of the ductus
that leads into a thickened area with a strong lobe on one side. From this a
slender neck leads into an immaculate, pyriform bursa.
Sugi (1987) stated that the type species and a relative feed on a wide range of
arboreal hosts in Japan; the larva illustrated is black with an irregular series
of large, pale yellow dorsal patches. The primary setae are long, white, and set
on small tubercles.
The range of the genus is from the Himalaya to temperate east Asia and Sundaland.
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