94 Bangs A New Fox from Santa Marta, Colombia. 



Cranial characters. The skull of U. aquilus is large (very large for the 

 size of the animal) and massive ; the region enclosed between the tem 

 poral ridges is narrow and the ridges themselves less strongly marked 

 than in U. cinere oargenteus ; no depression between postorbital process and 

 frontal, the frontals being evenly rounded ; postorbital processes small ; 

 zygomatic arch heavy and very low and straight, the malar very low 

 down, leaving little space between it and molar teeth ; palate broad ; 

 audital bullae short, deep, and round (very differently shaped from those 

 of U. cuiereoargenteiis) ; mandible like that of U. cinereoargenteus, with the 

 peculiar narrow, straight, tapering rami, except that the notch at poste 

 rior end of lower side of ramus is not so strongly marked. 



The dentition, though heavy throughout, is normal. 



Measurements. 



Total Tail Hind Ear from 



length, vert, foot, notch. 



8001, type d* old ad. 900 300 120 60 



8002, topotype 9 yg. ad. 860 290 125 65 



Skull (type, cf old adult) : Basal length, 122; zygomatic breadth, 74.6; 

 mastoid breadth, 48; breadth across postorbital processes, 42; breadth 

 of palate at middle of last molar, 22.8; length of palate, 63.6; greatest 

 length of single half of mandible, 104. 



Remarks. Among South American Canidte there appears to be a wide 

 variety of type forms that probably completely bridge over the differences 

 between Urocyon and the fox-like wolves of the subgenns Thorn. Such 

 species as Canis azarse, C. fulvipes, and C. urostictus appear to be connect 

 ing links, showing a strange mixture of characters. 



I can find no notice of any species like the subject of the present de 

 scription. While V. aquihis undoubtedly belongs in the genus Urocyon, 

 it differs cranially very much from U. cinereoargenteus, the type of the 

 genus. Its external characters are wholly those of Urocyon. 



