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Falana sordida Moore
Falana sordida Moore, 1882, Descr. new Indian lepid. Insects Colln W.S. Atkinson, p. 154.

Falana sordida

. The forewing shape and facies is diagnostic, particularly the distal margin with its falcate apex and dentate process dividing the more dorsal half. Facies features of note on the dark greyish ground are the paler grey antemedial band, transverse white dash of the reniform and submarginal black flecks near the apex.

Geographical range. Indian Subregion, Vietnam (Zilli, 1999), Thailand (VK), S. China, Peninsular Malaysia, Sumatra, Bali, Borneo.

Habitat preference. The species is uncommon in lowland forest, occurring in heath and alluvial forest as well as hill dipterocarp forest, and has been taken more rarely in lower montane forest up to 1000m. The species was recorded mostly in the understorey of primary forest in the vicinity of the Danum Valley Field Centre (S.J. Willott, unpublished data).

Biology. Bell (MS) reared the species from the egg, which is a depressed, light green dome. The hatchlings are a green-tinged honey-yellow, the darker setae arising from blackish green spots.

The mature larva has the prolegs on A3 half-sized and those on A4 only slightly reduced. It is cylindrical, though tapers slightly over the thoracic segments to the head. A8 is slightly domed and supports slightly larger dorsolateral tubercles than those elsewhere on the body. The head is orange. The body is banded black and bluish white transversely with two black bands per segment, except T1 is yellow, dotted black with the setal bases. A8 is orange, somewhat marbled.

The young larvae rest by the ribs of the undersides of the very young leaves on which they feed and on which the eggs are laid. Pupation is in a cell under a few pieces of leaf that the larva has cut off and placed over itself. The cell is on the upper surface of a leaf or elsewhere, and is cemented into a semi-ovoid cocoon with silk.

The host plant was
Mallotus (Euphorbiaceae). Robinson et al. (2001) also recorded Ficus (Moraceae) as a host plant in Hong Kong.

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