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Cyana effracta Walker
Barsine effracta Walker, 1854, List Specimens
lepid. Insects Colln Br. Mus., 2: 546.
Chionaema
pusilla Wileman,
1910, Entomologist, 43: 177.
Chionaema
effracta sumatrana van Eecke, 1927, Zool. Meded.
Leiden, 10:104.
Cyana
effracta
(approx.
lifesize)
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Diagnosis.
This species
differs markedly from other Cyana in
having a slightly translucent appearance, the forewings with three pale red
fasciae more evenly spaced across the central part of the wing, with a treble
stigma discally, a stigma between the medial and antemedial, a basal patch,
three rather elliptical submarginal patches reminiscent of those in Adites
Moore (see Adites
Moore), and some small
marginal flecks. The hindwings are white but with diffuse grey subbasal and
submarginal bands and a discal spot. These hindwing markings are usually much
more weakly expressed than in the illustrated specimen.
Taxonomic
note. Despite
the rather unusual facies, shared by the greyer C.
pellucida Rothschild (Java), there is a double pad of scales associated with
the forewing costa of the male. The genitalia are somewhat atypical, the valve
of the male being barely divided, with two angular processes on the ventral
margin towards the apex (weaker in a Himalayan male dissected), and the female
having prominent fields of long spines as well as a signum in the bursa.
Geographical
range. Nepal,
N.E. Himalaya, Taiwan, Burma, Peninsular Malaysia, Sumatra, Borneo.
Habitat
preference. There
is a specimen in USNM (illustrated) from 1530m, 1km south of Kundasang on the
slopes of G. Kinabalu. The species may favour disturbed, open areas at such
altitudes.
Biology.
Unpublished IIE
records have the host as Elettaria (Zingiberaceae),
but no indication of actual ingestion of higher plant tissue.
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