(Figs 3 A–G)
Eristalis morio (Zetterstedt, 1838): 612.
Literature. Bankowska (1968: 41); Stackelberg (1970: 59); Mamaev (1971: 503); Barkalov (1981: 414); Barkalov (1983b: 78); Zimina (1986: 56); Barkalov & Peck (1989: 611); Mutin & Barkalov (1999: 222).
Material examined. Russia: 4♀ Kola Peninsula, Lake Vudyavr, 11.06.1931, leg. V. Fridolin, ZIN; 1♀ St. Petersburg, Udelnaya Stn., 22.04.1930, leg. A. Stackelberg, ZIN; 2♀ St. Petersburg, Ligovo-Pulkovo 27.04.1897, leg. N. Kuznetsov, ZIN; 1♀ St. Petersburg, Pavlovsk 4.05.1919, leg. A. Stackelberg, ZIN; 2Ƌ Moscow, Abramtsevo Village, 1, 3.05.1959, leg. E. Smirnov, ZMMU; 4♀ Republic of Altai, Lake Teletskoye, environs of Artybash settlement 22.04.2011, leg. V. Zinchenko, ZMISEA; 1♀ Yakutia, Chara River, Tokko Village, 60 km SE of Olekminsk Town 30.05–4.06.1980, leg. E. Kajmuk, IBPC; 1♀ Yakutia, Lena River, Pokrovsk Village, 7.06.1980, leg. E. Kajmuk, IBPC.
Diagnosis. See under C. convexifrons.
Distribution. Europe: widespread. Russia: Republic of Altai and Yakutia.