1920, J. fed. Malay St. Mus., 8 (3): 131.
Diagnosis. The males have both forewings and hindwings a medium grey that darkens
towards the dorsum, particularly on the hindwing. The forewing has faintly
darker, poorly defined antemedial and postmedial fasciae.
Taxonomic note. The Bornean males have more uniformly grey wings than in typical indistincta
from Sumatra, and the fasciae are more diffuse, straighter. In typical indistincta
the hindwings are much paler, with long, dark grey scales only along the
dorsum. Both sexes are illustrated by Schintlmeister (1994) as Euproctis
servilis calvella Strand in his plate 6, though his genitalia figure is
correctly identified: the illustrations in the plate for the two species have
been cross-labelled. The genitalia of Bornean males have the saccus parallel
sided rather than tapering. The Bornean males may represent a distinct, but
related species. Schintlmeister (1994) illustrated the female of typical indistincta
Geographical range. Sumatra, Borneo.
Habitat preference. Three males have been taken, all from montane
localities: 900m on the limestone G. Api, Sarawak; 1680m on Bukit Pagon, Brunei;
1465m on Bukit Retak, Brunei.
to Contents page