Polyommatus erotides is a butterfly found in the East Palearctic (Saur, Altai, Siberia, Transbaikalia, Mongolia) that belongs to the blues family.
Formerly a subspecies of Polyommatus eros.
erotides Stgr. (80 d), from the mountains of Southern Siberia, is a large, blue-green male form, with broad black distal margin to the forewing, into which the deep black veins merge.
The larva feeds on Fabaceae.