FIELD BOOK OF MAMMALS 



brownish for basal two-thirds; underparts clear white. 

 Total length, 6 inches; tail vertebrae, 1.7 inches; hind foot, 

 .85 inch. Found in "Upper Sonoran Great Plains from 

 Wyoming and South Dakota to Texas. North to the Big 

 Horn River in Wyoming and to the Cheyenne River in 

 South Dakota ; east to Bonesteele, South Dakota, and Trego 

 County, Kansas; south to Fort Lancaster, Texas; and west 

 to Bear River Divide in southwestern Wyoming, Golden 

 and Salida, Colorado, and Santa Rosa, New Mexico." 

 (Hollister) 



Short-tailed Grasshopper Mouse. — Onychomys leucogaster 

 brevicaiidus Merriam. 

 Darker than arcticeps; smallest subspecies of leucogaster; tail 

 short. Upperparts a light wood-brown, rich and glossy, 

 darkened on face, head, and back; sides shading to cinna- 

 mon; ear tufts white basally, buffy at tips; ears dark brown 

 anteriorly, white posteriorly; tail above, grayish brown, 

 white-tipped, below, white; underparts pure white. Total 

 length, 5.6 inches; tail vertebrae, 1.6 inches; hind foot, .76 

 inch. Found in "Southern Idaho, extreme southwestern 

 Wyoming, northwestern Utah, and west across the northern 

 half of Nevada into Lassen, Plumas, and Mono Counties, 

 California." (Hollister) 



Brown Grasshopper Mouse. — Onychomys leucogaster fusco- 

 griseus Anthony. 

 Resembling brevicaudus but darker in color. Upperparts 

 rich, glossy, reddish brown, dark in tone, darkest along 

 dorsal region; sides browner; tail above, blackish brown, 

 tipped with grayish white, below, white; underparts white. 

 Immature pelages very dark, almost black. Total length, 



5.7 inches; tail vertebras, 1.5 inches; hind foot, .JJ inch. 

 Found in "Eastern Washington and Oregon, western Idaho, 

 and northeastern California. South to Klamath Lake and 

 the Madeline Plains." (HolHster) 



Dark-browed Grasshopper Mouse. — Onychomys leucogaster 

 melanophrys Merriam. 

 Darker and richer in color than arcticeps. Upperparts rich 

 pinkish-cinnamon to cinnamon-buff, washed with brownish 

 along dorsal region and top of head ; eyebrows dark brown ; 

 ear tufts pale buffy; ears blackish, edged with white; tail 

 above, pale brownish gray, tip and underside white; under- 

 parts clear white. Total length, 6.2 inches; tail vertebrae, 



1.8 inches, hind foot .88 inch. Found in "South central 

 and southeastern Utah, southwestern Colorado, north- 

 eastern Arizona, and northwestern New Mexico. North in 

 the Grand River Valley to Fruita, Colorado, and in the Rio 

 Grande Valley to northern Costillo County, Colorado. 

 West to Kanab, Utah, and Flagstaff, Arizona; east in New 

 Mexico to Santa Fe and the Sandia Mountains; south to 

 Acoma and the Zuni River." (Hollister) 



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