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Cusiala
Moore
Type species: boarmoides Moore.
This is another genus in the Biston complex. The facies is
similar to that of Iulotrichia, as are the features of the female
genitalia, but the male antennae are fasciculate, and a weak forewing fovea is
present. Sato (1984a) grouped the genus with Cleora Curtis.
The male genitalia have the valves of the boarmiine ground plan type as
in Iulotrichia. The uncus is bifid. The juxta is elongate, apically free,
often acute, as in Buzura. The aedeagus has a pair of longitudinal combs
near the apex as in Iulotrichia and a similar vesica, with an elongate
lens-shaped patch of fine, deciduous spicules.
The skin of the larva of the Japanese species is granulate (Sato, 1984a). It is illustrated by Sugi (1987) as bright green with a prominent dorsal
band striated rufous and dark brown that is expanded slightly over the thorax,
strongly over the anal hump and extends in a series of widely spaced rings round
the abdominal segments. It is polyphagous.
The genus consists of the type species, C. raptaria Walker from
Sri Lanka and S. India and C. stipitaria Oberthür from eastern Siberia
and Japan.
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