Spermophilus pygmaeus (Pallas, 1778) . Nova Spec. Quad. Glir. Ord., p. 122.

TYPE LOCALITY: U.S. S. R., Kazakh. S.S. R., between Ural and Emba Rivers .

DISTRIBUTION: Kazakhstan and S. Ural Mtns, to Crimea (U.S. S. R.).

COMMENT: Subgenus Spermophilus; see Gromov et al., 1965:257. See comment under musicus . Hybridizes rarely with erythrogenys, fulvus, and major; see Bazhanov, 1944, Dokl. Akad. Nauk S.S.S.R., 42(7):321-322, Bazhanov, 1945, Vestn. Kazakh. Fil. Akad. Nauk S.S.S. R., 5(8): 37 -39, and Denisov, 1964, Nauchin. Dokl. Vyssh. Shk. Biol. Nauki, 2:49-54. Also hybridizes with suslicus; see Denisov and Smirnova, 1976, Acta TherioL, 21:267-278.

ISIS NUMBER: 5301410002032020001.