FIELD BOOK OF MAMMALS 



Cascades. Apparently confined to the Transition Zone." 

 (Bailey) 



Gray-tailed Meadow Mouse. — Microtus canicaudus Miller. 

 Resembling typical nanus but yellower, tail grayer. Upper- 

 parts (winter) bright yellowish bister sprinkled with black; 

 sides paler; feet grayish; tail unicolor, grayish, with faint 

 dusky dorsal line. Summer pelage much as in winter, 

 tail more dusky on upperside. Total length, 5.6 inches; 

 tail vetebrte, 1.4 inches; hind foot, .8 inch. Found in 

 "Willamette Valley, Oregon, and the east base of the 

 Cascades in southern Washington, in Transition Zone." 

 (Bailey) 



Dutcher Meadow Mouse.^ — Microtus dutcJieri Bailey. 



"Size rather small; tail short; ears small, nearly concealed 

 by fur; color dark above and below; lips and usually nose 

 white; hip glands present in adult males." Upperparts 

 (summer) dark bister and brown; feet grayish; tail bicolor, 

 dusky and whitish; underparts dull cinnamon to buffy 

 brown. Total length, 6.5 inches; tail vertebras, 1.5 inches; 

 hind foot, .82 inch. Found in "Hudsonian Zone of the 

 southern Sierra Nevada." (Bailey) 



Nevada Meadow Mouse. — Microtus nevadensis Bailey. 



"Size large; ears small; tail rather short; fur coarse and 

 lax; colors dark; hip glands conspicuous in adult males." 

 (Bailey) Upperparts (winter) dark sepia or bister, heavily- 

 sprinkled with blackish; sides lighter; feet dark gray; tail 

 faintly bicolor, blackish and gray; usually white on lips 

 and tip of nose; underparts ashy. Total length, 8 inches; 

 tail vertebras, 2 inches; hind foot, i.o inch. Found in 

 Nye County (Ash Meadows) and Pahranagat Valley, 

 Nevada, Lower Sonoran Zone. 



Califomicus^ Group 



West-central California Meadow Mouse. — Microtus californi- 

 cus californicus (Peale). 

 Size medium; ears large and rising well above fur; hip 

 glands on adult males; pelage coarse and harsh. Upper- 

 parts ochraceous tawny to cinnamon-buff, sprinkled with 

 blackish; sides with less black; feet grayish; tail bicolor, 

 dark clove-brown and gray; underparts gray. Total 

 length, 7 inches; tail vertebras, 1.8 inches; hind foot, .88 

 inch. Found in "Coastal region of west-central California, 

 west of San Joaquin Valley, from Pozo, San Luis Obispo 

 County, north to San Francisco, and to Walnut Creek, Con- 

 tra Costa County. Vertical range from sea level up at 

 least to 2800 feet; zonal range Upper Sonoran and Transi- 

 tion." (Kellogg) 



^ For a recent and full revision of this group see Remington Kellogg, 

 University of California Publications in Zoology, Vol. 21, No. i, pp. 

 1-42, 1918. 



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