Cyana determinata Walker
Bizone determinata Walker, 1862, J. Linn. Soc.
Chionaema ridleyi Hampson, 1900, Cat. Lepid.
Phalaenae Br. Mus., 2:300, syn. n.
Chionaema bianca form insularis Draudt, 1914, Gross-Schmett.
Erde, 10: 174,
Cyana biana [sic.] insularis Roepke,
[1946a]: Tijdschr. Ent. 87: 29, syn.
are crimson red, straight, variable in width, and may or may not be edged black.
The male has three black discal dots in a triangle, the female has only the more
costal two of these, set longitudinally. In the male, the red bands may be
expanded to more or less surround the discal spots. The hindwing varies from
white to strong pink. The paler, less blackened individuals may be more frequent
in open and coastal areas.
effectively validated insularis as a
species-group name, but the specimen he had to hand is a female of costifimbria (see above). The synonyms presented bring together taxa
with very similar male genitalia, differing in the breadth of the red fasciae
and whether they are edged with black.
range of variation in this occurs in Borneo. Taxa that are probably distinct but
related include the yellow-tinged C.
aurantiorufa Rothschild from Sumatra and Nias and the redder C.
libulae Cernư comb. n. from Luzon and Negros in the Philippines. C.
carmina Cernư comb. n. from Palawan has redder hindwings and a
darker body than in determinata, but
may just represent an extreme of the range of variation seen in Bornean
material. The Himalayan C. coccinea Moore
also belongs to the group.
Peninsular Malaysia, Java, Bali.
is an infrequent to frequent species of lowland forest but may also occur in
disturbed and coastal habitats. One specimen was taken at 1000m in lower montane
forest during the Mulu survey.
Yunus & Ho (1980) and Zhang (1994) give the larval hosts as mosses and Hevea
(Euphorbiaceae: rubber); the former is more likely, the latter possibly
merely the substrate. However, Kuroko & Lewvanich (1993) recorded the larva
of coccinea as feeding on leaf tissue of Dimocarpus (Sapindaceae); they illustrated the larva and cocoon.
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