UROCYON. 475 
KEY TO THE SPECIES AND SUBSPECIES. 
A. Size small. 
a. Tail nearly one-half the length of head and 
body. PAGE 
Face Cut EPASOMENCE MN cia otigen te wl sb ele b ey xa abs U.c. guatemale 475 
Ie ee BPE Seta os ete oth 4 Howe 23 dy oe U. c. fraterculus 475 
b. Tail nearly one-third length of head and | 
PEAR ottverhrar aC ak HWE ME ce tians! vie acy ted we a U.c. parvidens 476 
B. Size large. 
a. Sides of neck, base of ears, and limbs cinna- 
Cu nuilel Dili Ce Maaeer iis". Acad a Se a re U.c. caltfornicus 477 
Db: Paler wears and tail longer... 6... aT eb elke ts Uc: scott 477 
c. Sides of neck, base of ears, and limbs ochra- 
UNE La ACS Se gC bn en a U.c. texensis 478 
cinereo-argenteus Guatemala (Urocyon), 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 vertebra, 327; hind foot, 
128. Skull: greatest length, 111; basal length, ror; palatal length, 
51.4; nasals, 33; zygomatic breadth, 60; interorbital breadth, 21.4; 
mastoid breadth, 40; upper tooth row, 46; mandible, 81; lower tooth 
TOW, 51. 
cinereo-argentews fraterculus (Urocyon), Elliot, Pub. Field Columb. 
Mus., 1, 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; 
