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Streptoperas Hampson
Type species: luteata Hampson
The forewings in this genus are narrowly falcate at the apex, the
hindwings strongly angled where vein CuA1 meets the margin. There are double
postmedials on both wings, that of the forewing acutely angled subcostally, that
of the hindwing straight. On the underside of the forewing there is a white zone
over the posterior half of the wing between the postmedial and subbasal fasciae.
The male antennae are lamellate.
In the male abdomen the eighth segment is unmodified. The uncus is
narrowly bifid as in Gogana and other genera in the palm-feeding
sequence, and the saccus is narrow, digitate as in some of these genera. The
valve is triangular, with a subbasal spur or flap on the costa.
In the female genitalia (luteata) the ovipositor lobes are
simple. The ductus is very long and slender, extending with the corpus bursae to
about half as long again as the abdomen. The corpus bursae is large, spherical,
finely scobinate, with a slight, umbonate signum.
Both included species occur in Borneo. The biology of one is described in S.
crenelata Swinhoe.
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