Sigmuncus arcuata Hampson comb. n.
Sadarsa arcuata Hampson, 1897, J.Bombay nat. Hist. Soc. 11: 454 (♂ )
Gyrtona camptobasis Hampson, 1897, Ibid. 11: 454 (♀ )
Diagnosis
The males of arcuata have the forewing distinctively modified, both in shape and venation (Fig. 11). The undescribed sister-species, flying in Sulawesi and New Guinea, has the male unmodified.
In both sexes forewing vein R1 anastomoses with the areole to enclose a triangular space; albigrisea does not show such anastomosis.
Geographical range
N.E. Himalaya, Sundaland, Philippines.
Habitat preference
The species has been taken infrequently in lowland, lower and upper montane forest types.
Genitalia:
