On the basis of these differences in pelage and the geographic isolation of the range, we judge that uintaensis should be retained as a subspecies of C. gapperi. It is clear, however, that C. g. uintaensis is less distinct from C. g. galei than are the other adjacent subspecies.
Specimens examined.--Total, 8, all in the University of Kansas Museum of Natural History, distributed as follows:
Wyoming: Uinta County: 9 mi. S Robertson, 8000-8400 ft., 3; 9 mi. S and 2 mi. E Robertson, 8000 ft., 2; 11-1/2 mi. S and 2 mi. E Robertson, 9200 ft., 1; 14 mi. S and 2 mi. E Robertson, 9000 ft., 1.
Utah: Uintah County: Paradise Park, 21 mi. W, 15 mi. N Vernal, 10,050 ft., 1.
Additional, marginal records (Durrant, Univ. Kansas Publ., Mus. Nat. Hist., 6:356, August 19, 1952).--Utah: Rich Co.: Monte Cristo, 18 mi. W Woodruff, 8000 ft. Salt Lake Co.: Emigration Canyon, 8 mi. above forks, 6,000 ft.; Silver Lake Post Office (Brighton), 9,500 ft. Wasatch Co.: Wolf Creek Summit, 9,800 ft. Daggett Co.: Beaver Dams, 10,500 ft.
Clethrionomys gapperi gauti, new subspecies
Type.--Male, adult, skin and skull; No. 133515, Biological Surveys Collections, United States National Museum, from Twining, 10,700 ft., Taos County, New Mexico; obtained on August 7, 1904, by James H. Gaut, original number 3086.
Range.--The Rocky Mountains of north-central New Mexico and south-central Colorado.