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Abaciscus Butler
Type species: tristis Butler.
Synonyms: Enantiodes Warren (type species stellifera Warren,
N.E. Himalaya) syn. n.; Prionostrenia Wehrli (type species costimacula
Wileman) syn. n.
This genus was excluded by Sato (1984a) from his Hypomecis complex.
The male antennae are strongly ciliate, with the ciliae on serrations in
some species. A fovea is present. The wings are mainly a dark, dull, greyish
brown, obscuring a ground colour of white (tristis) or fawn-yellow (most
other species). The ground colour tends to be more evident on the basal half of
the hindwing or in a narrow to broad costal band on the forewing. The type
species is exceptional in having a central marginal patch of white on the
forewing rather than a costal zone.
Definitive features are found in the male genitalia. The valve has the
apex finely cleft so the cucullus is separated from the ventral part of the
valve. At the base of the cleft a digitate spur arises from the ventral margin
of the costa and is directed ventrally. At the apex of the spur there is usually
a single robust seta. In the type species, intractabilis Walker, and a
few others there is a prominent setose furca.
The female genitalia have the bursa relatively long, the basal third
sclerotised and fluted, and the signum is absent. The sterigma is pad-like,
ringed by a setose fold.
The type species of Enantiodes Warren (see also Sato, 1980) and Prionostrenia
Wehrli share the diagnostic features just discussed and are therefore
brought into synonymy. A. kathmandensis Sato (1993) has facies very
similar to that of the type species of Enantiodes.
The genus is exclusively Oriental. Species transferred from a variety of
other genera in the section following bring the Bornean total to seven, the
highest recorded. Most taxa are montane, with some concentration in the lower
montane zone.
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