Type species: ruginaria Guenée.
Pingasa species have a characteristic facies of regular, crenulate dark
postmedials separating a marginal zone of the wing that is shaded or clouded
darker than the basal zone. Within this marginal zone there is a pale, but
similarly dentate or crenulate submarginal fascia. A particular generic feature
is the presence of two transverse brushes of scales on the hindwing. These are
in a different position from the situation in Hypodoxa and Sundadoxa, one being on the discal spot and the other displaced about 2-3mm distally
from this in a subdorsal position. In Sundadoxa the whole brush of scales
is just basal to the discal mark.
The male antennae are narrowly bipectinate.
Features of the male abdomen include a strong pair of setal patches on
the third sternite, an uncal structure shared with the next three genera where
the socii have become more or less fused basally, being narrowly separate only
over the distal portion, and deep, rather short valves that are often produced
at the apices of both the costa and the ventral margin. There are strong
coremata. The gnathus is often apically bifid. The aedeagus vesica has a distal
sclerotisation or blunt cornutus.
In the female (ruginaria) the ovipositor lobes are of the
modified geometrine form: the bursa is large, immaculate, set on a short ductus.
The larvae are robust, with skin granules, polyphagous, sometimes
feeding on the reproductive parts of the host-plant.
The genus is widespread and diverse throughout the Old World tropics.
There are nine species in Borneo.
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