UROCYON., 475 
KEY TOME Seb ClesvAND SUBSPEGIES: 
A. Size small. 
a. Tail nearly one-half the length of head and 
body. PAGE 
lee (16 i OUI IMSS oc) ARIE RR ar ecg re eRe Sm ee ire U.c. guatemale 475 
Perales lleewlagr eo Ane eee etee esc arcs aris, U.c. fraterculus 475 
b. Tail nearly one-third length of head and 
[DYOYE Fe. 34, Sa ep ri Se Rea naa are EO U.c. parvidens 476 
B. Size large. 
a. Sides of neck, base of ears, and limbs cinna- 
UUM ACO USA ew ts cn cutrslonsyS 2 aso rape Soy atin dp aoe ble U.c. californicus 477 
in Paler-vears;and ‘tail longer... <2. eee UG. SCOUL AT] 
c. Sides of neck, base of ears, and limbs ochra- 
CROWNS gos Blot hace OL enn On ae U.c. texensis 478 
cinereo-argenteus Suatemalae (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 vertebre, 327; hind foot, 
128. Skull: greatest length, 111; basal length, 1o1; 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-argenteus 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; 
