1889. _Lagomys schisticeps_ Merriam, N. Amer. Fauna, 2:11, October 30, type from Donner, Placer County, California. 1936. _Ochotona princeps schisticeps_, A. H. Miller, Jour. Mamm., 17:174, May 18. 1897. _Ochotona schisticeps_ Merriam, Mazama, 1:223, October. _Marginal records._--Nevada (Hall, 1946:590): 12 mi. E and 3 mi. N Ft. Bidwell, 5700 ft.; 8400-8600 ft., Duffer Peak, Pine Forest Mts. California (A. H. Howell, 1924:39): Tahoe; _Donner Pass_; 12 mi. NE Prattville; Lassen Peak; Mt. Shasta. OCHOTONA PRINCEPS SEPTENTRIONALIS Cowan and Racey. 1947. _Ochotona princeps septentrionalis_ Cowan and Racey, Canadian Field-Nat., 60:102, March 17, type from 6500 ft., Itcha Mountains, 52° 45´ N lat., 125° W long., British Columbia. Known from type locality only. OCHOTONA PRINCEPS SHELTONI Grinnell. 1918. _Ochotona schisticeps sheltoni_ Grinnell, Univ. California Publ. Zool., 17:429, April 25, type from 11,000 ft., "near" Big Prospector Meadow, White Mountains, Mono County, California. 1946. _Ochotona princeps sheltoni_, Hall, Mammals of Nevada, p. 593, July 1. _Marginal records._--Nevada: 8700 ft., Pinchot Creek (Hall, 1946:593). California: type locality. OCHOTONA PRINCEPS TAYLORI Grinnell. 1912. _Ochotona taylori_ Grinnell, Proc. Biol. Soc. Washington, 25:129, July 31, type from 9000 ft., Warren Peak, Warner Mts., Modoc Co., Calif. _Marginal records_ (V. Bailey, 1936:113, unless otherwise noted).--Oregon: N end of Steens Mts.; Guano Valley; Jack Lake, 20 mi. NE Adel; Adel. California (A. H. Howell, 1924:40): type locality; 5400 ft., "near" Termo, Madeline Plains; nr. head Little Shasta Riv. Oregon: Lower Klamath Lake. OCHOTONA PRINCEPS TUTELATA Hall. 1934. _Ochotona princeps tutelata_ Hall, Proc. Biol. Soc. Washington, 47:103, June 13, type from 8150 ft., Greenmonster Canyon, Monitor Mts., Nye County, Nevada. _Marginal records_ (Hall, 1946:591).--Nevada: 7500 ft., Smiths Creek, Desatoya Mts.; 8600 ft., type locality; 8700-11,000 ft., SW and W slopes Mt. Jefferson, Toquima Range; South Twin River; _Arc Dome_. OCHOTONA PRINCEPS UINTA Hollister. 1912. _Ochotona uinta_ Hollister, Proc. Biol. Soc. Washington, 25:58, April 13, type from "near" head E. Fork Bear River, Uinta Mts., Utah. 1924. _Ochotona princeps uinta_, A. H. Howell, N. Amer. Fauna, 47:19, September 23. _Marginal records._--Utah: type locality; Elk Park (Hall and Bowlus, 1938:337); _11,000 to 11,500 ft., The Nipple_ (_ibid._); 10,500 ft., SW slope Bald Mtn. (_op. cit._:336); Mt. Timpanogos (_op. cit._:337); 8500 ft., Morehouse Canyon, 5 mi. above Weber River (_op. cit._:337); _Spirit Lake_ (_op. cit._:336) not found. OCHOTONA PRINCEPS UTAHENSIS Hall and Hayward.