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Etanna breviuscula Walker comb. n.
Nanaguna breviuscula Walker, 1863, List Specimens lepid. Insects Colln Br. Mus., 27: 85.
valida Walker, 1863, List Specimens lepid. Insects Colln Br. Mus., 27: 101.
Bagistana rudis Walker, 1865, J. Linn. Soc. (Zool.), 7: 194.
xyloglypta Lucas, 1890, Proc. Linn. Soc. N. S. W. (2), 4(1889): 1073.
Symitha nigridisca Hampson, 1891, Illust. typical Specimens lepid. Heterocera Colln Br. Mus., 8: 87.
Clettharra floccifera Hampson, 1894, Fauna Br. India, Moths, 2: 386.


Etanna breviuscula

Etanna breviuscula

The modification of the male hindwing in this highly variable species and the next has been described in the generic account. The pale ochreous brown colour of most specimens (though some are shaded paler brown) and sinuous but acutely angular postmedial are also useful features for recognition; when the antemedial is evident, it is zig-zagged. The male genitalia of this and the next two species have the tegumen produced on either side of the uncus into socius-like structures. See also the next species for facies differences.

Taxonomic note. The type species of Apothripa,
iphida Hampson, may just be a dark female form of breviuscula as illustrated from Borneo in the Plate.

Geographical range. Indo-Australian tropics to Queensland and Fiji.

Habitat preference. The species is found commonly in a range of habitats, including secondary and plantation forests (Chey, 1994), from the coast to the upper montane zone at around 1800m.

Biology. The species was reared in India by Bell (MS). The larva is cylindrical, slightly fatter in the middle. The surface is smooth, dull, the segments distinctly evident. The colour is olive brown or green finely striated with orange, suffused fuscous dorsally between dorsolateral lines (or rather more intense dorsolateral borders), and white ventral to this extending to the supraspiracular region. The spiracular region is again suffused brownish, with whitish suffusion below that. Only primary setae are present.

The pupa is subcylindrical, broadly rounded anteriorly and squarely truncated posteriorly, the slightly convex A10 having beading of short longitudinal ridges almost complete (a ventral gap) round its anterior margin. Pupation is in a slight but strong, closely woven, closely fitting silken cocoon, ovoid in shape. There are no data on sound production within the cocoon.

The larva lives under a temporary tent of silken web in which particles of the flower buds on which it feeds are incorporated. The host plant was recorded as “char”.

Other sources (Robinson, 1975; Yunus & Ho, 1980; Kuroko & Lewvanich, 1993;  Zhang,  1994;  IIE and  FRIM  records  noted  by  Robinson  et al., 2001) give   as   host-plants:   Anacardium, Mangifera (Anacardiaceae); Shorea (Dipterocarpaceae); Cajanus, Calliandra, Desmodium (Leguminosae); Trema (Ulmaceae). The records are for both flower and foliage feeding.

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