300 Field Museum of Natural History — Zoology, Vol. XI. 



"Muzzle tawny, or yellowish brown, becoming more yellowish with age. Head 

 yellowish gray, not strongly contrasted with rest of body. Ears dark brown at 

 tips and back, soon fading to yellowish brown. Tail black, fading to gray with 

 black tip." Coyote or Prairie Wolf. Canis latrans, p. 322. 



"Muzzle blackish. Head grayish, face back of eyes sharply pepper and salt gray. 

 Ears large, back of ears dusky at tip, fulvous at base. Tail with tip black at 

 all ages." Gray Fox. Urocyon cinereoargenteus, p. 300. 



"Muzzle blackish. Head dusky with sides of face light yellowish. Ears large, 

 nearly the whole back of ears bright black at all ages. Tail dusky, tip white 

 at all ages." Red Fox. Vulpes fulvus, p. 305. 



Genus UROCYON Baird. 



Urocyon Baird, Mammals N. Amer., 1857, p. 121. Type Canis 

 virginianus Erxleben. 



□ Temporal crests widely separated; posterior 



angle of lower jaw abruptly emarginate below; upper 

 incisors not distinctly notched; lower sectorial tooth 

 with supplementary tubercle; postorbital process 

 of frontal bone concave, with its anterior outer edge 

 turned slightly upward; no frontal sinus present; 

 tail with central ridge of coarse black hairs. 

 Dental formula: 



upper view ot skuii. J-^ > ^> ' rVCi. > iVl. —42. 



(Much reduced.) Z~ 2> ^~^ 4-4 Z~' ?> 



Urocyon cinereoargenteus (Schreber). 

 Gray Fox. 



Canis cinereoargenteus Schreber, Saughthiere III, 1775, pi. XCII. 



Vulpes {Urocyon) virginianus Baird, Mammals N. Amer., 1857, p. 143 (Illinois). 



Urocyon cinereoargenteus Evermann & Butler, Proc. Ind. Acad. Sci., 1893 (1894), 

 p. 138 (Indiana). Hahn, Ann. Rept. Dept. Geol. & Nat. Resources Ind., 1908 

 (1909), p. 548 (Indiana). Howell, Proc. Biol. Soc. Wash., XXIII, 1910, p. 

 32 (Illinois). Wood, Bull. 111. State Lab. Nat. Hist., VIII, 1910, p. 572. 



Type locality — Eastern North America. 



Distribution — New York and New Jersey to Georgia, west to the Mis- 

 sissippi Valley and north at least to north-central Illinois; exact 

 limits of range not definitely determined. 



Description — Adult: General color of back and sides grayish, the hairs 

 being banded with black and grayish white ; sides of the neck and a 

 band across the chest red brown; ears, inner surface of legs, sides of 

 belly and under surface of tail also more or less red brown, the 



