California: Alpine County: Carson River, 1/4 mi. SW Woodfords, 5700 ft., 3 (MVZ); Diamond Valley, 5500 ft., 1 mi. SE Woodfords, 6 (MVZ); Faith Valley, [414] 1 (MVZ). El Dorado County: Glen Alpine Creek, near Fallen Leaf Lake, 6600 ft., 8 (MVZ); 1 mi. W Fyffe, 1 (MVZ); Fresno County: Hume, 1 (MVZ). Mariposa County: Chinquapin, 6700 ft., Yosemite Nat’l Park, 12 (MVZ); E fork Indian Canyon, 7300 ft., 8 (MVZ); Merced Grove, Big Trees, 7 (MVZ); 1 mi. E Merced Lake, 5 (MVZ); near Mono Meadow, Yosemite Nat’l Park, 4 (MVZ); near Mt. Hoffman, 8100 ft., Yosemite Nat’l Park, 5 (MVZ); Porcupine Flat, 8100 ft., Yosemite Nat’l Park, 9 (MVZ); Yosemite Creek, Yosemite Valley, 7 (MVZ); foot Yosemite Falls, Yosemite Nat’l Park, 8 (MVZ). Mono County: Walker Lake, 8000 ft., 5 (MVZ); Swager Canyon, 7800 ft., 3; Mono Lake P. O. 6500 ft., 4 (MVZ). Placer Co.: Truckee River, Squaw Creek, 1 (SDM); W bank Truckee River, 1 (MVZ). Plumas County: Rich Gulch, 3850 ft., 11 mi. W and 8 mi. N Quincy, 2 (MVZ). Shasta County: Warner Creek, 8000 ft., Lassen Peak, 6 (MVZ). Siskiyou Co.: Donomore Meadow, 5800 ft., 15 mi. W Hilt, 7 (MVZ); Poker Flat, 5000 ft., 12 mi. NW Happy Camp, 7 (MVZ); Little Shasta, 1 (USBS); Siskiyou Mts., 6000 ft., 2 (USBS); Sisson, 1 (SDM); Mt. Shasta, 6500 ft., 6 (MVZ). Salmon River Divide, 2 (MVZ); S fork Salmon River, 5000 ft., 7 (MVZ). Tehama County: 2 mi. W Black Butte, on Lassen Rd., 6800 ft., 5 (MVZ); 2 mi. E Mineral, 5200 ft., 2 (MVZ); 2 mi. S Yolla Bolly Mtn., 11 (MVZ). Trinity Co.: N fork Coffee Creek, 4500 ft., 34 (MVZ); Canyon Creek, 4 (USBS); 8 mi. NE Hyampon, 2900 ft., 1 (MVZ); 3 mi. NNW Mad River Bridge, 2900 ft., South Fork Mtn., 5 (MVZ); 11/2 mi. N Mad River Bridge, 3000 ft., South Fork Mtn., 6 (MVZ); 1 mi. SW North Yolla Bolly Mtn., 14 (11 MVZ); 1/2 mi. S South Yolla Bolly Mtn., 3 (MVZ). Tulare County: Jordan Hot Springs, Sierra Nevada Mts., 6700 ft., 9 (MVZ); Sherman Creek, Sequoia Nat’l Park, 1 (MVZ); Tokopah Valley, 7000 ft., Sequoia Nat’l Park, 1 (MVZ); 2 mi. E Kern Peak, 9300 ft., Sierra Nevada Mts., 1 (MVZ). Tuolumne County: head Lyle Canyon, Yosemite Nat’l Park, 10,000 ft., 9 (MVZ); Tuolumne Meadows, 8600 ft., Yosemite Nat’l Park, 1 (MVZ).

Nevada: Douglas County: 1/2 mi. E Zephyr Cove, Lake Tahoe, 6400 ft., 1 (MVZ). Ormsby County: S end Marlette Lake, 8000 ft., 2 (MVZ); 1/2 mi. S Marlette Lake, 8150 ft., 3 (MVZ). Washoe County: 1/2 mi. S Mt Rose, 9500 ft., 3 (2 MVZ); 3 mi. S Mt. Rose, 8500 ft., 3 (MVZ).

Oregon: Jackson Co.: Prospect, 3 (2 USBS, 1 MVZ); W slope Grizzly Peak, 4600 ft., 1 (USBS); Siskiyou, 1 (USBS); Longs Camp, N base Ashland Peak, 3300 ft., 1 (USBS).

Marginal records.—Oregon: Prospect. Nevada: 3 mi. S Mt. Rose, 8500 ft.; 1/2 mi. E Zephyr Cove, Lake Tahoe, 6400 ft. California: Mono Lake P. O., 6500 ft.; 2 mi. E Kern Peak, 9300 ft., Sierra Nevada Mts.; Rich Gulch, 3850 ft., 11 mi. W and 8 mi. N Quincy; Warner Creek, 8000 ft., Lassen Peak; 2 mi. S Yolla Bolly Mtn.; 8 mi. NE Hyampon, 2900 ft.; Siskiyou Mts., 6000 ft.; Poker Flat, 5000 ft., 12 mi. NW Happy Camp.

Zapus princeps princeps J. A. Allen

Zapus princeps J. A. Allen, Bull. Amer. Mus. Nat. Hist., 5:71-72, April 28, 1893; Preble, N. Amer. Fauna, 15:23, August 8, 1899.

Type.—Female, adult, skin and skull; No. 5260/4140, Amer. Mus. Nat. Hist.; Florida, La Plata County, Colorado; obtained on June 27, 1892, by Charles P. Rowley.

Range.—Sierra Madre, Medicine Bow, Laramie, and Big Horn mountains of Wyoming southward through Colorado into the Taos and San Juan mountains in northern New Mexico. See [fig. 46]. Zonal range: Transition, Canadian and Hudsonian.

Description.—Size, medium; back dark usually with broad mid-dorsal band of black mixed with Warm Buff or Ochraceous-Buff; sides light (Warm Buff) but varying to Ochraceous-Buff, always with admixture of black hair; lateral line distinct and broad, varying from Light Ochraceous-Buff to Ochraceous-Buff; [415] ventral surface white to base of hairs, frequently suffused with Ochraceous-Buff; tail indistinctly bicolored, tan to grayish-white below and pale brown above; hind feet grayish-white above; ears edged with white or yellowish-white; skull medium; large medial projection on inferior ramus of zygomatic process of maxillary; palate moderately long; postpalatal notch usually broadly rounded and posterior to posterior part of last molar; proximal part of inferior ramus of zygomatic process of maxillary broad; pterygoid fossae broad; auditory bullae moderately inflated.

Comparisons.—From Zapus princeps luteus, Z. p. princeps differs as follows: Total length, tail and hind foot longer; color darker, being less ochraceous; ears darker, edged with white or yellowish-white instead of Ochraceous-Buff; lateral line more distinct; skull larger, except least interorbital breadth which is smaller; auditory bullae larger, more inflated; pterygoid fossae larger; incisive foramina broader, longer, and posteriorly more truncate; nasals broader, tapering less distally.