Produced by Chris Curnow, Joseph Cooper, Anne Storer and the Online Distributed Proofreading Team at https://www.pgdp.net A New Chipmunk (Genus Eutamias) from the Black Hills BY JOHN A. WHITE University of Kansas Publications Museum of Natural History Volume 5, No. 19, pp. 259-262 April 10, 1952 University of Kansas LAWRENCE 1952 UNIVERSITY OF KANSAS PUBLICATIONS, MUSEUM OF NATURAL HISTORY Editors: E. Raymond Hall, Chairman, A. Byron Leonard, Edward H. Taylor, Robert W. Wilson Volume 5, No. 19, pp. 259-262 April 10, 1952 UNIVERSITY OF KANSAS Lawrence, Kansas PRINTED BY FERD VOILAND, JR., STATE PRINTER TOPEKA, KANSAS 1952 * * * * * A New Chipmunk (Genus Eutamias) from the Black Hills BY JOHN A. WHITE Study of the chipmunks from the eastern Rocky Mountains and Great Plains reveals that the chipmunks from northeastern Wyoming and from South Dakota which Howell (N. Amer. Fauna, 52:55, November 30, 1929) referred to _Eutamias minimus borealis_ actually belong to a heretofore unnamed subspecies which may be named and described as follows: #Eutamias minimus silvaticus# new subspecies _Type._--Female, adult, skull and skin, No. 20050 Mus. Nat. Hist., Univ. Kansas; from 3 mi. NW Sundance, 5900 ft., Crook County, Wyoming; obtained on July 4, 1947, by H. W. Setzer; original No. 1692. _Range._--Bear Lodge Mountains in northeastern Wyoming and the Black Hills of South Dakota. _Diagnosis._--Size large (see measurements); general tone of upper parts drab; sides Ochraceous Buff (capitalized terms are of Ridgway, Color Standards and Color Nomenclature, Washington, D. C., 1912); lateral stripes Fuscus Black washed with Ochraceous Tawny; ventral side of tail near (14' _h_) Ochraceous Orange and fringed with black. _Comparisons._--From _Eutamias minimus pallidus_ (specimens from Buffalo in Johnson County, Ivy Creek, Rockypoint, Middle Butte, and South Butte in Campbell County, all in Wyoming, and Harrison, Sioux County, Nebraska), the subspecies to the southward, westward, and northward, _E. m. silvaticus_ differs in: General tone of upper parts markedly darker, more reddish and less grayish; dorsal stripes darker; crown markedly darker. External measurements, and measurements and characters of the skull of the two subspecies, do not differ significantly. Unless otherwise specified all comparative material is in the Museum of Natural History of the University of Kansas. From _Eutamias minimus cacodemus_ (topotypes in the United States National Museum), the subspecies to the southeastward, _E. m. silvaticus_ differs in the same manner in which it differs from _E. m. pallidus_, but the degree of difference is greater because _E. m. cacodemus_ is even paler than _E. m. pallidus_.