Revision of the Coyotes. 





adult female from same place measures : basal lenixtli. 171 : l)asilar leuiitli 

 of Heusel, 107; zygomatic breadth, 94; palatal leugth, 90; mastoid 

 breadth, 59; length of crown of upper carnassial tooth, IS. 



Canis vigilis sp. nov. 



Ti/pe locality. — Manzanillo, Colima, Mexico. Type No. Htlh 9 young 

 adult, U. S. National ]Museum, Department of Agriculture collection. 

 Collected February 6, 1892,-by E. \V. Nelson. Original No. 1840. 



Characters. — Similar to C. peninsuhe, but darker and more highly col- 

 ored, with more black on forearm and no black on under side of tail ex- 

 cept at tip ; upper carnassial and first molar much smaller. 



Color. — Muzzle dull cinnamon rufous; top of head grizzled bu fly ful- 

 vous and black ; ears fulvous, upper parts buflFy-ochraceous, jirofusely 

 mixed with black (under fur fulvous) ; under parts strongly suffused with 

 pale fulvous ; throat collar with black tips strongly marked ; fore and 

 hind legs fulvous, as in ochropm^, but deeper, especially on forefeet; Ijlack 

 on upper side of forearm more e.xtensive; outer side of thigh and leg 

 strongly intermixed with black-tipped hairs, which reach down to or 

 below knee ; under side of tail dull pale fulvous, whitish basally, and 

 tipped with black (hairs of under side anterior to black tip not tipped 

 with black). 



Cranial and dental cliaracters. — The skull of the type specimen of Canis 

 vigilis, a young adult female, agrees in general characters with an adult 

 female peninsuhe from Cape St. Lucas, but is somewhat lai'ger, with 

 slightly broader rostrum and longer and more slender mandible. The 

 upper carnassial and molar teeth, however, are ver}' much smaller and 

 show that the two animals belong to diffei'ent sections of the group. Com- 

 pared with Canis mearnsi, its nearest neighbor on the north, C. rlglli>< has 

 a larger skull and very much smaller teeth, particularly the u])per car- 

 nassial and first molar. The first upper molar is decidedly smaller than 

 in any known form excejst (,'. microdon, from which it differs in being 

 deeply notched posteriorly. 



Measurements.— Type specimen, ? young adult: total length, 1155 ; tail 

 vertebrae, 335 ; hind foot, 190. 



Cranial mea.surements.— Type specimen : basal length, 166 ; basilar length 

 of Hensel, 163; zygomatic breadth, 87; palatal length, 85; mastoid 

 breadth, 59; length of crown of upper carnassial tooth, 17.5. 



