FIELD BOOK OF MAMMALS 



Tawny White-footed Mouse; Arizona Wood Mouse. — 



Peromyscus maniculatiis mfinus (Merriam) . 

 Richly colored, with much tawny. Upperparts ochraceous 

 to tawny ochraceous, with heavy sprinkling of dusky; usu- 

 ally conspicuous tufts at anterior bases of ears white mixed 

 with buffy ochraceous, narrow orbital ring, and small 

 whisker spot dusky in color; "ankles" buffy ochraceous; 

 underparts creamy white. Total length, 5.8-6.8 inches; 

 tail vertebras, 2.2-3.1 inches; hind foot, .76-84 inch. 

 Found in "Southern Rocky Mountain region, including the 

 elevated part of New Mexico, scattered peaks and ranges 

 in Arizona, eastern Utah, and the greater part of western 

 and central Colorado. Transition to Boreal Zones." 

 (Osgood) 

 Osgood Wliite-footed Mouse; Black-eared Deer Mouse.— 

 Peromyscus maniculatus osgoodi Mearns. 

 Resembling horealis but paler and more ochraceous in color, 

 paler than rufinus. Upperparts from cream-buff to pale 

 ochraceous buff, with light sprinkling of dusky; dorsal 

 region not much darker than sides; conspicuous white 

 tufts at anterior bases of ears, clear buffy spots at posterior 

 bases; "ankles" buffy, sometimes touched with dusky; tail 

 sharply bicolored, blackish brown and clear white; under- 

 parts clear creamy white. Total length, 5.9-6.8 inches; tail 

 vertebrae, 2.4-2.8 inches; hind foot, .8-84 inch. Found on 

 "Plains and foothills along the eastern base of the Rocky 

 Mountains from south central Saskatchewan to the Pan- 

 handle of Texas, occupying in general the eastern parts of 

 Montana, Wyoming, and Colorado, and the western and 

 southwestern parts of Saskatchewan and the Dakotas. 

 Upper Sonoran and Transition Zones." (Osgood) 

 Nebraska Deer Mouse. — Peromyscus maniculatus nehrascen- 

 sis (Coues). ^ ^^ 



Resembling osgoodi but slightly smaller in size, ears notice- 

 ably smaller, color brighter. Upperparts ochraceous buff, 

 sometimes much brighter and near orange-buff, with light 

 sprinkling of dusky; no well-defined dorsal stripe; occasion- 

 ally a bright ochraceous buff lateral line present; rest of 

 pelage about as in osgoodi. Total length, 5.7-6.3 inches; 

 tail vertebrae, 2.2-2.6 inches; hind foot, .76-. 82 inch. Found 

 in "Sandhill region of western Nebraska and adjoining parts 

 of the States of Kansas, Colorado, South Dakota, and 

 Wyoming. Possibly extending north to western North 

 Dakota and south to western Oklahoma." (Miller) 

 Baird White-footed Mouse.' — Peromyscus maniculatus hairdi 

 (Hoy and Kennicott). Plate XXIX. 

 Similar in size to nehrascensis but color darker. Upperparts 

 russet or warm brown, heavily sprinkled with black, usually 

 darker along mid-back; a narrow russet lateral line may or 

 may not be present ; tufts at bases of ears russet mixed with 

 dusky, only rarely with any white hairs ; blackish upperside 



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