278 VERTEBRATE ANIMALS OF THE UNITED STATES 



V. macrotis Merr. Long eared fox; desert fox. Length 850 mm.; 

 tail 290 mm.; hind foot no mm.; color grizzled gray above; sides ful- 

 vous; under parts white, mixed with buff; terminal quarter of tail black; 

 ears well haired, very long and broad; tail long and slender: Mexican 

 border from Texas to California. 



3. Urocyon Baird. Gray foxes. Upper incisors not lobed; tail 

 with concealed stiff" hairs and no soft under- fur : 7 species, 5 in the United 

 States and 2 in Central America, being most numerous in the semiarid 

 regions of the southwest; they do not dig a den, as do the red foxes, but 

 live in hollow logs or in cavities in the rocks; the young number from 3 

 to 9. 



Key to the Species of Urocyon 



ai In the eastern and central States U. cinereoargenteus. 



a2 On the Pacific slope. 



bi On the main land U . californiais. 



b2 On the islands off the coast U. clementcB. 



U. catalincB. 

 U. littoralis. 



U. cinereoargenteus (Schreber). Gray fox. Color gray, darker on 

 the back; sides of neck, collar and a band along belly tawny; 

 feet and tip of tail black; under parts whitish; length 900 mm.; tail 

 260 mm.; hind foot 125 mm.: northern America south of southern 

 New York and central New England, from the Atlantic to southern 

 California. 



Subspecies of U. cinereoargenteus 



U. c. cinereoargenteus (Schreber). Eastern States; southward to 

 Georgia; westward to the Mississippi Valley and Lake Michigan. 



U. c. hor calls Merriam. Size larger; fourth lower premolar very 

 large: southern New Hampshire. 



U. c.floridanus Rhoads. Size small; fur coarse; no white beneath: 

 Florida and southern Georgia. 



U. c. ocythous Bangs. Size large; color with more yellow: upper 

 Mississippi Valley north of Tennessee; westward to the plains. 



U. c. texensis Mearns. Colors pale; ears larger; tail longer: south- 

 western Texas. 



U. c. scotti Mearns. Tail and ears very long; color pale: Texas to 

 southern California. 



U. c. inymnsis Elliot. Color very pale: Inyo County, California. 



U. calijornicus Mearns. Similar to U. cinereoargenteus, but 

 smaller and paler and with larger ears and a longer tail; length 890 



