Revision of the Coyotes. 29' 



tween fore legs and along middle of belly ; long hairs of throat forming a 

 strongly marked collar, tinged with buffy and conspicuously mixed with 

 black-tipped hairs ; fore and hind legs and feet fulvous ; underside of tail 

 fulvous, whitish basally ; distal half with long hairs conspicuously tipped 

 with black, forming a black veil over the fulvous. 



Cranial and dental characters. The skull which Cams peninsalx resem 

 bles most closely is an adult male from the Cerro San Felipe, State of 

 Oaxaca, Mexico, assumed to belong to the species named cagottis by 

 Hamilton Smith. The skull of the type specimen of peninsulse agrees 

 with the Cerro San Felipe skull essentially in size and general characters, 

 but the rostrum is not so short and broad (in the Cerro San Felipe skull 

 it is remarkably broad posteriorly), and the lateral teeth, though large, 

 are uniformly smaller and less swollen. The difference is most marked 

 in the lower jaw. Compared with C. frustror from Texas, the skull of 

 pen'msulce is shorter, the frontal shield lessel evated posteriorly, and the 

 lateral teeth larger. Compared with its neighbor from the interior of 

 California, C. ochropus, the rostrum is very much broader, the whole 

 skull heavier and more massive, the horizontal ramus of the mandible 

 deeper and more * bellied,' and the lateral teeth larger and thicker. 



Cranial measurements. Type skull, $ adult : basal length, 169; basilar 

 length of Hensel, 167 ; zygomatic breadth, 99 ; palatal length, 90 ; mastoid 

 breadth, 57; length of crown of upper carnassial tooth, 20.5. 



Canis microdon sp. nov. 



Type locality. Mier, on Rio Grande River, State of Tamaulipas, Mexico. 

 No. 39654> cT adult, U. S. National Museum, Department of Agriculture 

 collection. Collected April 28, 1891 , by William Lloyd. Original No. 478. 



Characters. Size small; coloration rather dark ; upper surface of hind 

 foot whitish ; belly sprinkled with black-tipped hairs ; carnassial and 

 molar teeth very small. 



Color. Muzzle pure cinnamon rufous ; top of head grizzled grayish and 

 ochraceous ; ears fulvous ; rest of upper parts buffy-ochraceous, profusely 

 mixed with black hairs (under fur buffy or buffy-ochraceous^ ; under 

 parts whitish between fore legs and between thighs; middle of belly 

 buffy, with black-tipped hairs extending all the way across and also 

 reaching forward along median line to long hairs of throat, which latter 

 are strongly marked with black-tipped hairs ; fore legs and feet fulvous, 

 becoming whitish on inner side of leg; upper side of forearm strongly 

 mixed with black ; hind legs and feet pale fulvous on outer side, chang 

 ing to white on inner side of leg and upper surface of foot ; under side of 

 tail pale buffy fulvous, whitish at base, and with hairs of distal half 

 broadly tipped with black. 



Cranial and dental characters. Skull short and broad ; muzzle and palate 

 exceedingly short and broad ; teeth small, particularly the carnassial and 

 first upper molar. 



Remarks. Canis microdon does not require close comparison with any 

 known wolf. From its nearest relative, C. mearnvi, it differs in shorter 



