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Pseuderosia Snellen
Type species: cristata Snellen.
The facies of Pseuderosia species is much as in some of the more
angular-winged Gogana species. The forewing margin is angled at vein CuA1
and the hindwing at vein M1 and more weakly at Sc and CuA1, with the tornus also
more or less right-angled. The hindwing thus has a squarish appearance distally.
Particular facies features include a longitudinal block of darker colour just
distal to the forewing discal spot and a series of pale lunules submarginally to
the more anterior angles of the hindwing. The forewing post- and antemedials are
angled at about one third from the costa.
The male abdomen is characterised by lateral pairs of coremata, the
strongest being between the fourth and fifth segments, getting progressively
weaker with progress distally. The fifth to eighth segments have a narrow ribbon
of sclerotisation around their anterior margins. The genitalia have the bifid
uncus typical of the two preceding genera and the two following. The valves are
robust, the saccus broad. The aedeagus is ornamented distally.
The female of the type species has the ovipositor lobes rather heavily
sclerotised, with basal and distal projections, apically narrowed. The ductus
and the bursa are longer than the abdomen, the former with a heart-shaped
swelling near the ostium, and the latter ovate, generally scobinate, with the
scobination extending well down the ductus. There is a single, rather tongue
like signum.
The genus consists of the following two species and possibly one other
from Sumatra reared from oil-palm by R. Desmier de Chenon. The larvae may be
specialist palm-feeders.
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