MAMMALS OF THR MEXICAN BOTJNDAKY. 



165 



The. peccary of the lower Kio (iraiule ajid of caHlerii Mexico is a 

 smaller animal, having relatively small ears and feet (fig. 8) and a 

 blacker coloratipn. The coat is more dense and the bristles less 

 coarse, rigid, and crinkled than in the form here described. The 

 Texas peccary is blackish, whereas the peccary of Arizona and 

 Sonora is grayish, with a black dorsal stripe. 



Fig. 6. — Tayassu angu- 



LATUM eONORlENSE. 



Skull, front view. 

 (Cat. No. 35815, 

 U.S.N. M.) 



Pig. 7.— Tayassu anpu- 

 latum sonokiense. 

 Inner surfackof ear. 

 (Cat. No 206.'")6, 

 U.S.N. M.) 



Fig. 8.— Tayassu angulatum sonori- 

 ENsi;. (Cat. No. 20667, U.S.N. M.) 



a, KKillT IllNDFOOT: 6, RIGHT FORE- 

 FOOT. 



A young specimen was seen alive, having been caught by a Mexican 

 ranchman on Cajon Bonito Creek, Sonora, August 25, 1892, at which 

 time it was about as large as the eastern cottontail. Color, above 

 reddish brown, with a black vertebral area^ beginning anteriorly as a 

 black spot on the nape, extending thence in a line backward and 

 again broadening on the lumbar region, where it bifurcates before 

 terminating. Upper surface thickly sprinkled with black hairs e.x- 

 cei3t in the area occupied by the " collar." Under parts and limbs 



strongly marked as in yucatanensis, but yellowisb fulvous instead of white. 

 Skull of male similar to that of male angulatus; skull of female decidedly 

 larger, with longer tooth row. In skulls young enough to show the sutures the 

 nasal bones are sti-ongly convex posteriorly, long and slender, and only slightly 

 broader between maxillie than between premaxillie (differing markedly from 

 their condition in anonJutim, in which they are very much broader between the 

 maxillse) ; and the ascending or nasal ann of premaxilla is decidedly longer 

 than in anf/iilatun. 



Remarks. — Compared with sonoriensis of Arizona, the sides are less gray, 

 the dorsal band less sharply defined, the shoulder stripes yellower and much 

 more strongly marked. The sexual disparity in size is greater than in sono- 

 riennin, the female being considerably larger than the male. 



Measurements. — Type ( 9 ad.) : Total length 960, tail 00, hind foot 215. 

 SJcull: Basal length 203, occipitonasal length 224, zygomatic breadth 108, great- 

 e.st breadth across squamosals posteriorly !)0, palatal length l.'il ; length of 

 upper molariform series 07. (0. Hart Mcrriam, Proc. Biol. Soc. Washington, 

 XIV, 1901, p. 122. 



