MAMMALS 



321 



108 mm.; hind foot 26 mm.: Great Plains from the Dakotas to Mexico; 

 westward to the base of the Rockies. 



P. penicillatus Woodhouse (Fig. 176). Color buff ; length 205 mm.; 

 tail 1 10 mm. ; hind foot 25 mm. ; tail long and crested : 

 southern California, Arizona and Nevada. 



P. intermedius Merr. Color drab; fur harsh, with 

 spines on the rump; length 179 mm.; tail 102 mm.; 

 hind foot 22 mm. : southern Arizona and New Mexico. 



P.fallaxM.eTr. Color dark drab; length 192 mm.; 

 tail 104 mm.; hind foot 23 mm.: southern California. 



P. femoralis Allen. Size very large; tail and ears 

 very long; color dark drab; under parts dirty white; 

 length 227, mm.; tail 126 mm.; hind foot 27 mm.: 

 extreme southern California. 



P. calif ormcus Merr. Color dark drab; under 

 parts yellowish white; rump and flanks supplied with 

 bristles; length 192 mm.; tail 103 mm.; hind foot 24 

 mm. : central and southern California. 



Subspecies oj P. californicus 



P. c. californicus Merr. Vicinity of San Francisco 

 Bay. 



P. c. dispar Osgood. Size larger; color paler: 

 coast valleys of California; southward to San 

 Bernardino. 



P. c. ochrus Osgood. Color paler; length 200 

 mm.: Kern County, California. 



2. Dipodomys Gray. Kangaroo rats (Fig. 177). 

 Body slender; hind legs and tail very long, the tail 

 black dorsally and ventrally and white on the sides 

 and ending with a penicillate tuft; hind foot with 

 either 4 or 5 toes; fur soft; soles of feet hairy; fore legs 

 very short; dentition i/i, 0/0, i/i, 3/3; color 

 brownish or yellowish, with a conspicuous white 

 stripe across the thigh; eyes large: about 50 species 

 and subspecies, mostly in western America; burrow- 

 ing, nocturnal animals with remarkable jumping powers, making jumps 

 4 to 6 feet long. They inhabit deserts and dry plains, feeding on seeds 

 and leaves, and raise from 2 to 6 young in a litter. 



\\\ 



Fig. 177. — Dipodo- 

 mys agilis {after Stone 

 c^ Cram). 



