1893. Lagomys collaris Nelson, Proc. Biol. Soc. Washington, 8:117, December 21, type from near head of Tanana River, Alaska.
1897. [Ochotona] collaris, Trouessart, Catalogus Mammalium ..., p. 648
Marginal records.—Alaska: Mt. McKinley (A. H. Howell, 1924:36). Yukon: head of Coal Creek, Ogilvie Mountains (ibid.). Mackenzie: mile 63E on Little Keel River, Canol Road (Anderson, 1947:94). Yukon: Macmillan Pass, mile 282, Canol Road (ibid.); Ross River, mile 96, Canol Road (ibid.); vic. Teslin Lake (A. H. Howell, 1924:36). British Columbia: Tagish Lake (ibid.); Stonehouse Creek, 5-1/2 mi. W jct. Stonehouse Creek and Kelsall River (29088 KU). Alaska: Tanana River (A. H. Howell, 1924:36).
Upper parts Drab to Light Drab; underparts creamy white; grayish patch on nape and shoulders; skull broad; tympanic bullae large; total length 189; hind foot, 30.
Ochotona princeps
Pika
Total length, 162-216; hind foot, 25-35; weight of O. p. tulelata, 6 ♂ 121 (108-128), 2 ♀ 121 and 129 grams. Upper parts varying from grayish to Cinnamon-Buff depending on the subspecies; underparts with wash of buff. Eight Nevadan females had an average of 3.1 (2-4) embryos. The mode was 3.
Ochotona princeps albata Grinnell.
1912. Ochotona albatus Grinnell, Univ. California Publ. Zool., 10:125, January 31, type from 11,000 ft., near Cottonwood Lakes, Sierra Nevada, Inyo County, California.
Marginal records (A. H. Howell, 1924:45).—California: Bullfrog Lake; 10,000 ft., Independence Creek; type locality; Mineral King, E. Fork Kaweah River.
Ochotona princeps brooksi A. H. Howell.