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“Heoeugorna”
flavicincta
Hampson
Heoeugorna
flavicincta Hampson, 1926, Descr. Gen. Spec. Noctuinae,
p. 495.
Diagnosis.
The general shape and forewing markings resemble those of Undatavitta shayleenae,
but the wings have conspicuous yellow borders, those of the forewing broader but
suffused down in the apical zone and containing rows of small dark dots. The
distinct mauve tint to the fasciation of shayleenae is
lacking.
Taxonomic
note. Though some of the fasciation of the forewing resembles that of
Undatavitta,
the male hindlegs have tarsal hair rather than tibial hair, and the male
genitalia do not show any Undatavitta
features.
There is no scaphium. The tegumen has wing-like structures on each side that do
not appear to be homologous with those in U. aroa.
The tegumen is only slightly longer than the vinculum, unlike in typical Heoeugorna,
and the vinculum forms a strong, triangular saccus. The valves are relatively
small, rhomboidal, with a small subbasal, subcostal ampullate process
interiorly. The aedeagus vesica is relatively broad, with areas of both fine and
coarse scobination. Further north on the Asian mainland (N.E. Himalaya, Vietnam,
Thailand (VK)) there is a species with more extensive yellow on the forewings
and reduced yellow on the hindwings. A female from Sulawesi has the yellow on
both fore- and hindwings more extensive.
Geographical
range. Sumatra, Peninsular Malaysia (Barlow Colln), Borneo.
Habitat
preference. This is an uncommon species. In recent surveys two specimens
have been recorded from lowland forest at 300m in the Ulu Temburong of Brunei
and one from lower montane forest at 1000m on G. Kinabalu.
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