Colias tyche Boeber, 1812.
Range: polar regions of Euroasia and Alaska and the mountains of
the temperate Asia.
ssp.: deckerti Verity, 1909; range: Transbaikalia.
A female, wings closed.
Open pine forest on a hill just NE of the Chita City,
Transbaikalia, Siberia, Russia. 17th June 1995. O. Kosterin pteryx rhamni (Linnaeus, 1758) - Brimstone