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Arctornis heteroides Collenette comb. n.  
Lymantralex heteroides Collenette, 1938, J. fed. Malay St. Mus., 18 (2): 264.

Arctornis heteroides

Arctornis heteroides

There is some sexual dimorphism in heteroides, the females having more irregular, less clearly defined fasciae and wings that are more produced in the centre of the margin. The forewing has oblique postmedial and antemedial fasciae amid a general brown stippling on white. The hindwing has a lens-shaped area at the margin divided off by an arcuate brown line. The venation of the forewing has R1+R2 stalked independently from R3-R5. The harpe of the valve is rather weak, flattened, and in a more dorsal position.

Geographical range. Peninsular Malaysia, Sumatra, Borneo.

Habitat preference. The species is uncommon, mostly recorded from lowland forest, but with two records from altitude in Brunei: 1465m on Bukit Retak; 1680m on Bukit Pagon.

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