94 Bangs — .1 New Fox from Santa Marta, Colombia. 



Cranial characters. — The skull of 11. aquilus is large (very large for the 

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

 poral ridges is narrow ami the ridges themselves less strongly marked 

 than in U. cinereoargenteus; nodepression between postorbital process and 

 frontal, the frontals beinsj 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. cinereoargenteus) ; 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 

 No - Sex ' length, vert, foot, notch. 



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



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



Skull, (type, $ 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, 101. 



Remarks. — Among South American Canidie 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 subgenus Thous. 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. aquilus undoubtedly belongs in the genus Urocyon, 

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

 L'enus. Its external characters are wholly those of Urocyon. 



