Colias viluiensis

Colias viluiensis, is a butterfly in the family Pieridae. It is found in Transbaikalia.

Description
Pale orange-yellow, with rather narrow distal margin, light-centred middle spot on the forewing and very large, reddish-brown-edged middle spot on the hindwing. Underside pale yellow; hindwing dusted with greenish, the distal margins being pale blackish, the middle spot of the forewing having a light-coloured centre and the large white middle spot of the hindwing being double and edged with black; female red or white, hindwing sometimes almost black.

Subspecies

 * C. v. viluiensis
 * C. v. dahurica Austaut, 1899
 * C. v. heliophora Churkin & Grieshuber, 2001 Chukotka

Taxonomy
Treated as a subspecies of Colias hecla by Josef Grieshuber & Gerardo Lamas, who point out that the spelling viluensis was used by Ménétriés in his earliest published description.