Spermophilus tereticaudus Baird, 1858 . Mammalia, in Repts. U.S. Expl. Surv., 8(1):315.

TYPE LOCALITY: [Old] "Fort Yuma" [Imperial Co., California, USA] .

DISTRIBUTION: Deserts of SE California, S Nevada, W Arizona (USA), NE Baja California and Sonora (Mexico).

SYNONYMS: apricus (Huey, 1927); arizonae (Grinnell, 1918); chlorus (Elliot, 1904); eremonomus (Elliot, 1904); neglectus Merriam, 1889; sonoriensis Ward, 1891; vociférons (Huey, 1926).

COMMENTS: Subgenus Xerospermophilus (Hall, 1981:405) . Reviewed by Ernest and Mares (1987, Mammalian Species, 274). See also mohavensis .