Type species: chalybeata Moore.
In facies this genus resembles Euxena, but with the
hindwing black discal spot much larger and the underside a uniform medium grey
in all species except C. discospilata Moore, where it is dull orange. The
male antennae are narrowly bipectinate to about three-quarters or lamellate. On
the hindwing, veins Rs and M1, and M3 and CuA1, arise separately from the cell
rather than being stalked.
the male abdomen there is a pair of setal patches on the third sternite. The
eighth tergite is obtusely bifid in the type species and finely setose distally:
the distal margin of the sternite is also setose, slightly concave. In the
genitalia the uncus is spatulate or bifid, flanked by tongue-like socii that are
two thirds as long again and invested with a dense coat of fine setae. The
gnathus is divided into a slender, upcurved, apically acute process on each
side. The valves are moderate to small, the dorsal half more strongly
sclerotised, giving rise to a long, slender spine subbasally. The saccular
portion of the valve is closely associated with the vinculum and bears a corema.
In the female the
ovipositor lobes are of the modified type. The sterigma is massively sclerotised,
the bursa very small, without a signum.
The genus is restricted
to the Oriental Region, with only the type species extending to Sundaland.
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