Erebia ligea (Linnaeus, 1758) - Arran Brown.

An example of a biennial species. In some places the species is absent each second year, in anothers its abundance greatly differs in odd and even years. Ivanov, A.I., V.A.Lukhtanov, V.N.Prasolov, B.M.Sokolov. 1987. [Periodical appearance of Erebia ligea L., E. embla Thunb., and Oeneisjutta Hbn. butterfflies (Lepidoptera, Satyridae) in Leningrad region of the USSR]// Vestnik Leningradskogo Universiteta. Vol.2. No.10. P. 8-12 [in Russian]. Such a phenomenon is met with in a number of Satyrids and Papilionids (such as Parnassius delphius).

Range: the forest zone of Euroasia, except for the northern East Siberia, ajacent mountains, Pacific islands.

ssp.: eumonia Menetries (= ajanensis auct.); range: the mountains of South Siberia and East Asia.

A male; wings closed.

The left bank of the Koksu River 2 km of its junction with the Dzhazatr River, 1600 m above sea level, the eastern spurs of the Katunskiy moutain range, Central Altai Mts., West Siberia, Russia. 24th July, 1988. Oleg Kosterin.