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Lophoptera acuda Swinhoe
Gyrtona acuda Swinhoe, 1906, Ann. Mag. nat. Hist. (7), 17:549.
Lophoptera hyalophctea de Joannis, 1928, Ann. ent. Soc. France 97: 333, syn. n.
Lophoptera acuda Swinhoe; Holloway, 1976: 19.

Lophoptera acuda

Lophoptera acuda

This is a small species with brown forewings that are variably marked with darker brown, dull pale yellow and mauvish grey. All variants have a pale yellow triangle on the dorsum submarginally and most have a pale yellow bar connecting the reniform to the costa. Two of the commoner forms are illustrated; another frequent form is as in the one with the basally yellow forewing, but with that yellow area containing a dark brown spot and another dark patch just basal to the reniform.

The male genitalia have slender, oblong valves with a double, subbasal harpe. The female genitalia have the appendix bursae twice as large as the bursa and ornamented with bands of fine scobination in a herring-bone pattern; the signum in the bursa is weak; the post-ostial invagination is small but there are two setose flaps between it and the ostium.

Geographical range. S.E. Asia, Peninsular Malaysia, Sumatra, Borneo.

Habitat preference. The species has been taken from the lowlands to about 2000m. During the Mulu survey it was slightly more numerous in tall forest at 250m and lower montane forest at 900m on the limestone G. Api, and also at the Long Pala site where the trap was set on a limestone outcrop overlooking alluvial forest canopy. No specimens have been taken in heath (kerangas) forest.

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