MEADOW MOUSE 



black and gray; underparts gray to whitish. Total length, 

 7 inches; tail vertebrae, 1.8 inches; hind foot, .84 inch. 

 Found in "Sierra Nevada and Great Basin regions of 

 eastern California from head of San Joaquin River, in 

 Fresno County, north to Goose Lake, Modoc County, 

 west to vicinity of Cassel, Shasta County, and east across 

 the Nevada line. Vertical range from 3000 feet up to 10,350 

 feet; zonal range Transition to Hudsonian." (Kellogg) 



Gary Meadow Mouse. — Microtus montanus caryi Bailey. 

 Resembling typical montanus in size but paler and with 

 shorter tail. Upperparts (spring pelage) warm buffy gray 

 grizzled with black; sides of nose clear buff; tail above 

 dusky, below whitish; underparts and feet white to silvery 

 gray. Total length, 7.1 inches; tail vertebrae, 1,8 inches; 

 hind foot, .84 inch. Found in Wyoming "along streams 

 in the arid sagebrush country of the Bear River, Green 

 River, and Wind River Valleys ..." (Bailey) 



Arizona Meadow Mouse. — Microtus montanus arizonensis 

 Bailey. 

 Resembling typical montanus but brighter colored. Upper- 

 parts (winter) yellowish to rusty brown; feet dark grayish; 

 tail bicolor, blackish and grayish; underparts whitish. 

 Total length, 7 inches; tail vertebrae, 2 inches; hind foot, 

 .8 inch. Found in "Plateau country of eastern Arizona, 

 at head of Little Colorado, in the Transition Zone." 

 (Bailey). 



Utah Meadow Mouse. — Microtus montanus rivularis (Bailey). 

 Larger than typical montanus, lighter in color. Upper- 

 parts (winter) dull bister sprinkled with black; sides almost 

 as dark as back; feet dull grayish; tail bicolor, blackish 

 and grayish; underparts whitish. Total length, "^.2 inches; 

 tail vertebrae, 1.9 inches; hind foot, .9 inch. Found in 

 Washington C^ounty, Utah, "probably restricted to Lower 

 Sonoran Zone." (Bailey) 



Dwarf Meadow Mouse. — Microtus nanus nanus (Merriam). 

 "Size small; tail short; ears short and rounded; color dark 

 grayish; skull slender." (Bailey) Upperparts (summer) 

 everywhere mixed gray, sepia, and blackish; feet grayish; 

 tail bicolor, dusky gray and whitish; underparts whitish. 

 Total length, 6 inches; tail vertebrae, 1.6 inches; hind foot, 

 .72 inch. Found in "Rocky Mountains and outlying 

 ranges, from central Idaho southward to central Nevada 

 and southern Colorado, in Canadian Zone." (Bailey) 



Gray Meadow Mouse. — Microtus nanus canescens Bailey. 

 Lighter gray than typical nanus; adult males with con- 

 spicuous hip glands. Upperparts (summer) mixed pale 

 buffy and black producing general dark gray tone; sides 

 lighter than back ; feet dark gray ; tail bicolor, blackish and 

 grayish; underparts white. Total length, 6 inches; tail 

 vertebrae, 1.7 inches; hind foot, .8 inch. Found in "Northern 

 Washington and southern British Columbia, east of the 



421 



