Plebejus argus (Linnaeus, 1758) - Silver-studded Blue.
Range: the non-tropical Eurasia north to the middle taiga zone.
ssp. clarasiaticus (Verity, 1931); range: E Altai, the Sayans, Transbaikalia, W Amurland.
A copulating pair.
Russia, Siberia, Khakas Republic, Shira District, 2 km SE of village Efremkino, 54o26' N 89o28' E, alt. 500-800 m, stony steppen S-exposed slope with lime rocks. 4/VII 2000. O. Kosterin.