Sorex haydeni Baird, 1858 . Mammals, in Repts. Expl. Surv ...., 8(1): 29.

TYPE LOCALITY: U.S.A., " Nebraska,” Fort Union (later Fort Buford, now Mondak, Montana, near Buford, Williams Co., North Dakota.)

DISTRIBUTION: S.E. Alberta, S. Saskatchewan, S.W. Manitoba (Canada); N.W. Montana southeast to N.C. Kansas, east to western and southern Minnesota (U.S.A.).

COMMENT: Separated from cinereus by Junge and Hoffmann, 1981:36; see also Van Zyll de Jong, 1980, J. Mammal., 61:66-75.