Melitaea didymoides Eversmann, 1847.
This species belongs to a group of almost vicariant species close to Melitaea didyma (Esper, 1779).
Range: Tuva Republic, the East Sayan, the southern Baikal region, S and E Transbaikalia, the upper Amurland, S Primorye, E Mongolia, NE China.
ssp.: didymoides Eversmann, 1847; range: the western part of the range.
A male, wings closed.
A steppefied meadow at Lake Butyvken, surrounded by a magnificent pine forest within a steppe zone called Tsasucheiskii Bor, 10 km SW of the village Nizhnii Tsasuchei, Onon District, SE Chita Province, Transbaikalia, Siberia, Russia. 4th July 1996. O. Kosterin.