Nygmia postgrisea Rothschild
1920, J. Fed. Malay St. Mus., 8:131.
1932, Novit. zool., 38: 67, syn. n.
Diagnosis. Both sexes have a diagnostic pale whitish patch posterior to the black
discal dot of the forewing, the rest of the wing being yellow, heavily suffused
with black scales. Some specimens have diffuse black spots at the M1 on margin
just posterior to the apex (See Nygmia castor
Collenette comb.n) but variation in Borneo
is not as extreme as that illustrated for Sumatra by Schintlmeister (1994).
Taxonomic note. The uncus is atypical of Nygmia, being divided, and the valves
are extreme in structure, divided into three slender, unequal processes as
illustrated. The aedeagus vesica and apical spur is more typical, though
scobination of the former is weak. The worn holotype (Sumatra) of postgrisea has
genitalia as in leucophleba. The species illustrated as postgrisea by
Schintlmeister is new and described on (See "Euproctis"
Geographical range. Sundaland.
Habitat preference. Most records are from lowland forest, but the species
has also been recorded once from ridge forest at 900m on Bukit Monkobo, Sabah,
and twice at 1618m on Bukit Retak, Brunei.
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