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Europlema
instabilata Walker comb. n.
Erosia instabilata Walker,
1866, List Specimens lepid. Insects Colln Br. Mus., 35: 1646.
Epiplema desistaria instabilata Walker;
Holloway, 1979: 345.
Diagnosis. The facies is somewhat intermediate between that of desistaria and
semibrunnea, the hindwing resembling that of the latter and the forewing
that of the former, though with a more arcuate row of submarginal lunules and
lacking a white patch on the underside. The male genitalia have the uncus and
gnathus much as in instabilata, and also the valves are small,
triangular, though their ventral processes are diagnostically short and broad.
The female has the base of the bursa similar to that of semibrunnea, except
with the ductus seminalis opening narrower. The signum is much smaller and more
basal, with a smaller zone of spining opposite.
Geographical range. Borneo, S. Moluccas, New Guinea, Solomons, Queensland,
New Caledonia.
Habitat preference. The larval description (see generic account) of
Bigger (1988) is probably referable to instabilata rather than semibrunnea,
as the latter is much rarer in the Solomons.
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