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Sigmuncus arcuata Hampson comb. n.  
Sadarsa arcuata
Hampson, 1897, J. Bombay nat. Hist. Soc. 11: 454 ( )
Gyrtona camptobasis
Hampson, 1897, Ibid. 11: 454 ( )

Sigmuncus arcuata

Sigmuncus arcuata

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.

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