Toxoproctis dyssema Collenette
1932, Novit. zool., 38: 59.
1935, J. Fed. Malay St. Mus., 17: 714, syn. n.
sensu Schintlmeister, 1994: 119.
Diagnosis. This is a highly variable species, ranging from purely yellow specimens,
the hindwings paler, to those with both wings extensively suffused with dark
grey: a selection is illustrated. A fairly constant feature is the rather
sinuous, diffuse, pale antemedial fascia on the forewing. The species is best
diagnosed on features of the male genitalia: the broad, square uncus; the valve
shape, deep, with acute apex and strong saccular curvature; the shorter stouter
aedeagus. The female lacks a sclerotised tube at the base of the ductus, being
strongly fluted and thickened there.
Geographical range. Peninsular Malaysia, Sumatra, Borneo.
Habitat preference. The species is not uncommon in the lowlands and
extends with less frequency into montane zones to as high as 1780m.
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