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Drepanorhina Hampson
Type
species: shelfordi Swinhoe, Borneo.
The
facies of the only included species is described below. It is similar to some of
the species in the New World genus Metalectra
as
mentioned on p. 374.
The male
abdomen is diagnostic. The eighth segment is somewhat divergent from that
typical of the group. The tergite is broad, but has slight apodemes. The
sternite is of the ‘W’ form but deeper than typical, with long lateral rods
arising from near the basal angles of the ‘W’. The scaled area distal to it
is much more extensive, with pronounced lateral lobes. The genitalia have a long
slender uncus and valves with a series of processes along the costa to the apex,
resembling Panilla. Interior lobes from the centre of the tegumen on
each side may also be homologous with structures in Panilla,
but the diaphragm beween and central to these is strongly crinkled. The vinculum
is robust, horseshoe-shaped, and the valve bases are broad, bearing numerous
long, deciduous hair-setae. The aedeagus is slender, strongly curved, and the
vesica has a long, fluted, tapering diverticulum arising from one of three
shorter, broader ones. The juxta is the clearest example of the inverted ‘V’
or ‘Y’ type found widely in the Catocalinae.
The
female has an ostium set almost longitudinally within the eighth segment,
leading into a long, narrow, sclerotised ductus bursae that is obtusely angled
centrally. A coiled appendix bursae typical of the boletobiines arises at the
junction of the ductus with the somewhat pyriform corpus bursae. The latter
lacks a signum but is weakly and finely scobinate or rugose throughout.
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