Specimens lepid. Insects Colln Br. Mus., 14: 1515.
Zool. Soc. Lond., 1867: 57.
diplostigma Hampson, 1893, Illust. typical Specimens lepid.
Heterocera Colln Br. Mus., 9: 24, 109.
discalis melli Draudt, 1950, Mitt. münch. ent. Ges.,
Through most of its range there is marked sexual dimorphism of facies (in ssp. melli
sexes converge on the female form). The forewings are irregularly fasciated pale
grey in the female and almost white in the male, with a distinctive darker zone
defined postmedially on the costa, pale-centred in the female but more uniformly
dark in the male. The hindwings are also darker in the female.
note. There is some slight variation in the male genitalia through the
range. The Bornean specimen dissected has a rather long uncus, with narrower
lateral arms, and a longer and broader juxta than in males from Sri Lanka and
Taiwan. The Sri Lankan male (slide 19115) had a more typical inverted ‘V’
type of juxta.
range. Sri Lanka,
India, Thailand (VK), Vietnam (Zilli, 1999), Peninsular Malaysia, Sumatra,
Borneo; China, Taiwan (ssp. melli);
preference. Recent surveys have yielded only two specimens from lowland
forest at 30-60m near Labi and 300m in the Ulu Temburong of Brunei, and one from
1618m on Bukit Retak. Martini & Thöny (1993) recorded the species from 950m
on G. Trus Madi in Sabah. There are also two specimens from Samarinda in the
lowlands of Kalimantan.
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