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Achrosis lithosiaria Walker comb. n. 
Omiza lithosiaria Walker, 1862, List Specimens lepid. Insects Colln Br. Mus. 24:1085.

Achrosis lithosiaria

Achrosis lithosiaria

This and the next species have similar uniform grey forewings, but the angled forewing margin in lithosiaria has been lost in rigorata; the latter has straight oblique fasciae, but these are irregular and only strong costally and sometimes dorsally in lithosiaria. The female forewings are more rufous in lithosiaria.

Taxonomic notes. The species is close in facies to the Himalayan A. quadraria Warren comb. rev. It resembles the next species also, sharing the uniform, grey forewings and spinose aedeagus apex.

Geographical range. Borneo, Peninsular Malaysia, Sumatra.

Habitat preference. The species is found in both lowland and lower montane forest zones.

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