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Gogana
abnormalis Warren
Trotothyris abnormalis Warren,
1897, Novit. zool., 4:19.
Diagnosis. Males of this and the next species resemble those of specularis but
have a conspicuously darkened zone between the submarginal and the margin of the
forewing between the central angle and the tornus. The hindwing is smaller,
narrower, with a satiny white zone around the patch of raised scales on the
hindwing. The female is larger, paler ochreous brown, with an enlarged,
triangular translucent zone on the forewing associated with a linear white
fascia that also occurs medially on the hindwing. The hindwing tornal margin is
strongly excavate.
Geographical range. Borneo, Peninsular Malaysia, Sumatra.
Habitat preference. This is a rare species, taken mostly in lowland
localities, but with one specimen from 1618m on Bukit Retak, Brunei.
Biology. H. Steiner (in litt.) has reared the larva in Peninsular Malaysia
(see figure, above). It is whitish with a duller orange head. The head has black spots of
various sizes from which the setae arise. Each body segment has a central ring
of spined scoli, three on each side, translucent, with black tips. Black bars
over the dorsal half occur on each side of the segmental rings of scoli such
that there are two transverse black bars between each ring, and between the bars
a slight, irregular blackening of the intersegmental membrane. The suranal area
is not markedly elongated.
The pupa is green with some slight, irregular brownish stippling
dorsally on the abdomen. It is formed in a sparse silken cocoon in a folded leaf
pinna.
The host-plant was the palm, Calamus manan.
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