Monocerotesa commissa Prout

Chiasmia strigata Warren, 1893, Proc. zool. Soc. Lond., 1893: 412.

Chiasmia strigata commissa Prout, 1932, J. fed. Malay States Mus., 17: 80.

Diagnosis

The wings are yellow, finely striated and blotched with dark brown. The forewing discal spot is prominent.

Taxonomic Notes

• Bornean specimens are somewhat smaller than Himalayan ones. In the male genitalia the apex of the valve is less produced, angled rather than straight ventrally, and the saccular spur is shorter, less sclerotised.
• Sato (2007b) reviewed the species of Monocerotesa Wehrli found in Sumatra. He considered that commissa Prout is a species distinct from strigata Warren and should be applied to the Bornean species, which he also recorded from Sumatra and Sulawesi. The female genitalia illustrated are of strigata, but those of the male are referable to commissa.

Geographic Range

Borneo, Peninsular Malaysia (B), Sumatra, Sulawesi.

Habitat Preference

Lowland forest.

Genitalia: