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Cheromettia Walker

Type species: ferruginea Moore.
The species are sexually dimorphic, the males being rufous brown or black; those with males black with triangular hindwings show a greater degree of sexual dimorphism. In all taxa the forewings of the male are narrower than those of the female, a characteristic also of the presumed sister genus, Belippa Walker. The male antennae are broadly bipectinate only over the basal quarter, those of the female being filiform. In both sexes these are small black patches at the apex of the forewing and the apex and tornus of the hindwing, though these are obscured in black males.

In the male genitalia there is a rectangular, distally spined plate at the base of each valve (shared with Belippa where it is broader and flexed ventrad rather than directed dorsad). The setose lateral margins of the tegumen are rather markedly lobed ventrally as in Atosia Snellen and in the next genus.

The female bursa (sumatrensis) has a scattering of small spines, presumably a reduction from the array of small stellate signa seen in Belippa. The ductus is weakly spiralled. The eighth segment is somewhat elongate, the apophyses small (absent in Belippa). The membrane between the eighth segment and the ovipositor lobes is extensive and finely setose.

The larva appears to be of constant form within the genus (Horsfield & Moore, 1859; Moore, 1882-4; Piepers & Snellen, 1900; Wood, 1968 (colour photo); Kalshoven, 1981; Bell, M.S.) subovate, dull bluish green with several longitudinal rows of small yellow spots and devoid of processes. The Indian species apicata Moore, lohor Moore and ferruginea Moore, and the Sundanian species are all of this form.

The species are polyphagous and have been recorded (references above, unpublished CIE records and Browne, 1968) from Musa (Musaceac), Elaeis (Palmae), Aleurites, Ricinus (Euphorbiaccae) Careya (Barringtoniaceae). Eugenia (Myrtaceae) Theobroma (Sterculiaceae), Ixora, Coffea, Mussaenda (Rubiaceae), Mangifera (Anacardiaceae), Schleichera, Nephelium (Sapindaceae), Erythrina, Butea, Phaseolus (Leguminosae) Juglans (Juglandaceae) and Toona (Meliaceae).

Most of the species (some undescribed) arc found in the Indian Subregion. C. sumatrensis is the most easterly species.

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