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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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