UROCYON. 475 



KEY TO THE SPECIES AND SUBSPECIES. 



A. Size small. 



a. Tail nearly one-half the length of head and 



body. PAGE 



a/ Bullae small U. c. guatemala 475 



b.' Bullae large U. c. fraterculus 475 



b. Tail nearly one-third length of head and 



body U. c. parvidens 476 



B. Size large. 



a. Sides of neck, base of ears, and limbs cinna- 

 mon rufous U. c. californicus 477 



b. Paler; ears and tail longer U. c. scotti 477 



c. Sides of neck, base of ears, and limbs ochra- 



ceous U. c. texensis 478 



cinereo-argenteus guatemalce (Urocyori), Miller, Proc. Acad. Nat. 



Scien. Phil., 1899, p. 278. 

 GUATEMALAN GRAY Fox. 



Type locality. Nenton, Guatemala. 



Geogr. Distr. Humid tropical region of Guatemala, and State of 

 Chiapas, Mexico. 



Genl. Char. Similar to U. c. littoralis Baird, but darker. 



Color. Above gray, lower fur creamy buff; sides more buffy; 

 middle of belly and between hind legs white, remainder ochraceous 

 buff; top of head tawny; back of ear tawny ochraceous, this hue 

 extending to front leg but suffused with gray; ear ochraceous, distal 

 half interspersed with dusky; cheek and throat white; feet dark griz- 

 zled grayish; outer side of hind leg ochraceous, inner side white; tail 

 gray and black, with black dorsal band and tip, beneath ochraceous. 



Measurements. Total length, 830; tail vertebras, 327; hind foot, 

 128. Skull: greatest length, in; basal length, 101; palatal length, 

 51.4; nasals, 33; zygomatic breadth, 60; interorbital breadth, 21.4; 

 mastoid breadth, 40; upper tooth row, 46; mandible, 81 ; lower tooth 

 row, 51. 



einereo-argenteus fraterculus (Urocyon), Elliot, Pub. Field Columb. 



Mus., i, 1896, p. 80. 

 LITTLE GRAY Fox. 



Type locality. San Felipe, Yucatan, Mexico. 



Geogr. Distr. Yucatan, Tehuantepec; range unknown. 



Genl. Char. Size small; colors dark. 



Color. Top of head silvery gray, darkest on median line; super- 

 ciliary stripe grayish white ; back of head and neck gray washed with 

 fulvous; upper parts dark gray, lower back black sprinkled with gray; 



