MAMMALS 323 



D. ingens (IVIerr.). Hind foot with 5 toes; size very large; color 

 ochraceous buff; length 330 mm.; tail 185 mm.: Fresno, San Luis 

 Obispo and Santa Barbara Counties, California. 



D. spectabilis Merr. Color ochraceous buff; length 350 mm.; tail 

 211 mm.; hind foot with 4 toes: western Texas, to Arizona. 



D. elator Merr. Hind foot with 4 toes; color clay; length 290 mm.; 

 tail 170 mm.: northern Texas and southern Oklahoma. 



D. merriami Mearns. Hind foot with 4 toes; color clay; length 

 240 mm.; tail 143 mm.: California to Texas. 



Subspecies of D. merriami 



D. m. merriami Mearns: Mohave Desert, southeastern Nevada and 

 southwestern Arizona. 



D. m. exilis Merr. Color darker: San Joaquin Valley, California. 



D. m. parvus Rhoads. Color buffy gray; length 248 mm.; tail 

 154 mm.: southern California. 



D. m. nitratoides Merr. Color darker; dusky crescent over nose; 

 size smaller: Tulare County, California. 



Subspecies of D. ordii 



D. ordii Woodhouse. Hind foot with 5 toes; color clay; length 

 244 mm.; tail 140 mm.; hind foot 39 mm.: western States. 



D. 0. ordii Wood. Southern Texas to Arizona. 



D. 0. columbianus (Merr.). Color darker; length 2^2 mm.; tail 

 130 mm.: northern portion of the Great Basin. 



D. 0. utahensis (Merr.). Color clay; length 260 mm.; tail 147 mm.; 

 hind foot 40 mm.: northern Utah. 



D. 0. richardsoni (Allen). Color paler; length 267 mm.; tail 144 

 mm. ; hind foot 40 mm. : western Texas, north into Utah and Wyoming. 



D. 0. montanus (Baird). Color yellowish brown; length 245 mm.; 

 tail 137 mm.: Castilla County, Colorado. 



D. 0. longipes (Merr.). Color bright ocracheous buff; length 

 275 mm.; tail 165 mm.; hind foot 42 mm.: Painted Desert, Arizona. 



3. Microdipodops ^Nlerriam. Kangaroo mice. Size very small; 

 penicillate, four-striped tail lacking; mastoid region very much inflated; 

 dentition i/i, 0/0, 1/ 1, ^/^\ hind foot with 5 toes: 4 species. 



M. californicus Merr. Color olivaceous; under parts snow white; 

 length 160 mm.; tail 92 mm., terminal third blackish; hind foot 25 mm.: 

 southern California. 



M. pallidus Merr. Color pale buff; tail without a dark tip; length 

 171 mm.; tail 102 mm.; hind foot 25 mm.: Churchill County, Nevada. 



