Oreta pingorum sp. n.
17, 18mm. This species is a
member of the extensa Walker (N.E. Himalaya, W. & S. China, Sumatra,
Java, Sulawesi) group of Watson (1967) where the facies is similar to that of
yellow and red forms of species in the insignis Butler group of which
three species are described immediately following. However, the red colour is
brighter, and the forewing postmedial is simply pale, not edged darker red
interiorly. The forewings are generally more falcate than in the insignis group.
The species of the extensa group are most reliably distinguished by the
male genitalia. All have a charactristically bifid uncus, a vestigial gnathus,
and a reduced valve with two strong processes. It is the form of these latter
that distinguishes species within the group. The new species is closest to extensa
but has the processes much shorter and unequal, the upper one angled,
dorsally serrate, apically acute, and the lower one shorter, a robust, basally
slightly bulbous spine. There is a tongue-like setose process associated with
the lower spine. The aedeagus is shorter, lacking a central bulge, and having a
longer, narrower, laterally directed scobinate process at the apex.
BRUNEI: Kampong Kapok, 10m, 22.i. 1996 (T. W. Harman) BM drepanid
Paratype . As holotype but 19.i.1996.
Geographical range. Borneo, Sulawesi (slide 814), Buru, New Guinea (slide
Habitat preference. The type locality is coastal with mangrove.
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