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Celerena Walker

Type species: divisa Walker, Bangladesh.

Synonym: Bociraza Walker (type species recurvata Walker, Maluku).

Celerena species all have the same sort of grey and yellow pattern as the Bornean representative, but the yellow varies in brightness and the grey can be paler or almost black, extending over more of the wing surface. Males are characterised by two rather unusual features: a pleat runs for almost the length of the posterior half of the forewing cell, most conspicuous on the underside where it contains paler, possibly androconial scales; the hind tibia is swollen, the spurs are long, and the dorsal portion is conspicuously produced over the first tarsal segment that is itself expanded ventrally in a triangular plate.

On the male abdomen (C. signata Warren) the setae in the patches on the third sternite are about twice as long as in other desmobathrines. There are transverse lines of hairs on the seventh and eighth sternites. The uncus is a long, slender column, distally bifid. The valves are elongate, rectangular, bearing a central lobe subbasally that has a fringe of stout setae.

In the female the ductus is slender, long, expanding into a narrowly pyriform bursa. The corpus bursae is longitudinally fluted and has a sclerotised, scobinate band running its length as a signum, the scobination directed laterally from its central axis.

The only host record is of Rinorea (Violaceae) for the Andamans endemic, C. andamana Felder & Rogenhofer (IIE unpublished records), a species very similar in appearance to the type species.

The genus extends from India to the Solomons but exhibits by far its greatest diversity in New Guinea.

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