FIELD BOOK OF MAMMALS 



Geographical Distribution. — Warmer zones of western 



North America. 



Food. — Principally seeds, and some grains; green foliage 

 sometimes eaten. 



Enemies. — vSnakes, Owls, Foxes, Coyotes, Weasels, Badgers, 

 Bobcats, and other small carnivores. 



Species and Subspecies of the Genus Dipodomys 



The pattern of coloration as just described is quite constant 

 throughout the genus, most of the variation being in color or 

 intensity of shade, size, presence or absence of the "great" 

 toe, and in cranial characters. 



Agilis Group 



Gambel Kangaroo Rat. — Dipodomys agilis agilis Gambel. 

 As described above, normally five-toed. Found in "South- 

 ern California, almost altogether on its Pacific slope, from 

 northern Santa Barbara County southeast through Ven- 

 tura, Los Angeles and Orange counties into western San 

 Bernardino and western Riverside counties as far as the 

 San Bernardino and San Jacinto mountains. Altitudinal 

 range, close to sea-level up to 7500 feet. Life-zone,_ chiefly 

 Upper vSonoran, but extends locally up into Transition and 

 down into Lower Sonoran." (Grinnell) Plate XXVL 



Dulzura Kangaroo Rat,^ — Dipodomys agilis simidans (Aler- 

 riam). 

 Resembling typical agilis but smaller and darker in general 

 coloration. Upperparts dusky pinkish cinnamon. Total 

 length, 1 1.4 inches; tail vertebrce, 6.9 inches; hind foot, 1.7 

 inches. Found on "The Pacific slope of San Diego County, 

 probably extending south into Lower California. Alti- 

 tudinal range, from sea-level up to 3000 feet. Life-zone, 

 Upper Sonoran, ranging locally down into Lower Sonoran." 

 (Grinnell) 



Cabezon Kangaroo Rat. — Dipodomys agilis cahezona (Mer- 

 riam). 

 Smaller than typical agilis, with dark markings reduced, 

 and paler in coloration. Upperparts light pinkish cinna- 

 mon. Total length, 11.3 inches; tail vertebrse, 6.8 inches; 

 hind foot, 1.7 inches. Found on "The desert slopes of the 

 coastal mountains of southern California, from Cabezon, 

 Riverside County, south through eastern San Diego County 

 to, and probably beyond, the Mexican line. Altitudinal 

 range, 1700-3500 feet. Life-zone, Upper Sonoran and 

 upper edge of Lower Sonoran." (Grinnell) 



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