The animals available from Glacier, British Columbia, are in color more nearly like Z. p. saltator and cranially combine the characters of Z. p. idahoensis, Z. p. saltator, and Z. p. kootenayensis. The sum total of their characters places them with Z. p. saltator. Anderson (1932:108) remarks on the disparity of size between the two sexes of Z. p. kootenayensis, stating that females are considerably larger than males. I have examined most of the material used in the original description and find that animals of like age in the two sexes show no significant size difference. Anderson (loc. cit.) seems to have compared young males with adult females.
Specimens examined.—Total, 68, distributed as follows:
British Columbia: Manning Park, 3 (PM); Good Fellow Creek, Manning Park, 1 (PM); Mt. Beaver Valley, 6300 ft., Manning Park, 1 (PM); Timberline Valley, 6500 ft., 3 (PM); Allison Pass, 1 mi. E Manning Park, 1 (PM); Monashee Pass, 4000 ft., 13 (PM); Hope-Princeton Summit, 5500 ft., 1 (NMC); Hedley, Stirling Creek, 1 (NMC); Anarchist Mts., 1 (PM); Fairview-Keremeos Summit, 5 (NMC); Westbridge, 2 (NMC); Midway, 2 (NMC); Green Mtn., near Rossland, 6000 ft., 12 (11 NMC, 1 MVZ); Mt. Old Glory, 7000 ft., Rossland, 5 (4 NMC, 1 MVZ); Rossland, 5800 ft., 12 (11 NMC, 1 MVZ); Camp 6, Meadow Creek, 7 mi. SE of Yahk, 1 (NMC).
Idaho: Bonner County: 5 mi. W Cocolalla, 3500 ft., 2 (MVZ). Boundary County: 4 mi. W Meadow Creek, 3000 ft., 2 (MVZ).
Marginal records.—British Columbia: Monashee Pass, 4000 ft.; Camp 6, Meadow Creek, 7 mi. SE Yahk. Idaho: 4 mi. W Meadow Creek, 3000 ft.; 5 mi. W Cocolalla, 3500 ft. British Columbia: Hope-Princeton Summit, 5500 ft.; Manning Park.
Zapus princeps luteus Miller
Zapus luteus, Miller, Proc. Biol. Soc. Washington, 24:253, December 23, 1911.
Zapus luteus australis, Bailey, Proc. Biol. Soc. Washington, 26:132, May 21, 1913. Type from Socorro, Socorro County, New Mexico.
Type.—Female, adult, skin and skull, No. 133601, U. S. Nat. Mus. Biol. Surv. Coll., Espanola, 5000 ft., Rio Arriba Co., New Mexico; obtained on June 24, 1904, by McClure Surber, original No. 162.
Range.—White Mt’s of southern Apache County and northern Greenlee County, Arizona; in New Mexico, from the Sacramento Mt’s, Otero County, northward to the San Juan Mt’s, Rio Arriba County. See [fig. 46]. Zonal range: Lower Sonoran (1 individual), Upper Sonoran, Transition, and Canadian.