FIELD BOOK OF MAMMALS 



pale buffy in coloration; dark markings reduced. Total 

 length, 10.5 inches; tail vertebree, 6 inches; hind foot, 1.64 

 inches. Found in "Owens Valley north from Olancha nearly 

 to Benton, Mono County; also the Mohave Desert in the 

 vicinity of Victorville, San Bernardino County. Altitudinal 

 range, 2700-7700 feet. Life-zone, Lower Sonoran ; reaches 

 into lower edge of Upper Sonoran locally." (Grinnell) 



Preble Kangaroo Rat. — Dipodomys microps prehlei (Goldman). 

 Color darker than in typical microps or in levipes. Upper- 

 parts near pinkish cinnamon, finely sprinkled with black. 

 Total length, 10.5 inches; tail vertebrae, 6.2 inches; hind 

 foot, 1.64 inches. Found in "Plains regions of southeastern 

 Oregon and northwestern Nevada." (Goldman) 



Light-footed Kangaroo Rat. — Dipodomys levipes (Merriam). 

 Size medium; face narrow; ear small; toes five in number; 

 coloration dusky in tone; dark markings well developed. 

 Total length, 11 inches; tail vertebra, 10.3 inches; hind foot, 

 1.7 inches. Found in "Territory of moderate altitude ly- 

 ing east of Owens Valley, and extending north into Nevada; 

 westernmost station, Olancha, Inyo County; southern- 

 most, head of Emigrant Canon, Panamint Mountains, 

 Inyo County. Altitudinal range, 3600-5300 feet. Life- 

 zone, Lower vSonoran in its upper portion." (Grinnell) 



Deserti Group 



Big Desert Kangaroo Rat. — Dipodomys deserti deserti Stephens. 

 Size very large ; toes four in number ; general coloration very 

 pale; tail white-tipped and without dark ventral stripe; 

 dark facial markings absent ; sole of hind foot without dark 

 stripe; pelage very long and silky. Upperparts pale och- 

 raceous buffy, with very faint dusky wash. Total length, 

 13.7 inches; tail vertebrae, 8 inches; hind foot, 2.1 inches. 

 Found in "(in California). — The Colorado and Mohave 

 desert regions, from the Mexican line north to Death 

 Valley and through Owens Valley on east side at least to 

 Alvord, Inyo County (Stephens, 1906, p. 156); west on 

 Colorado Desert to Borego Spring, in eastern San Diego 

 County, and to Palm Springs and Whitewater, Riverside 

 County, and on Mohave Desert to vicinity of Hesperia, 

 San Bernardino County, and Olancha, Inyo County. Alti- 

 tudinal range, — 200 to 3900 feet. Life-zone, Lower 

 Sonoran " (Grinnell) 



Heermanni Group 



Northern California Kangaroo Rat. — Dipodomys heermanni 

 calif ornicus (Merriam). 

 Size medium; face broad; toes usually four in number; tip 

 of tail white; general coloration dark. Resembling agilis 

 in coloration, but slightly darker. Total length, 12.5 

 inches; tail vertebras, 7.8 inches; hind foot, 1.8 inches. 

 Found in "Northern California, chiefly east of the humid 



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