164 Bangs New Mammals from Santa Marta, Colombia. 



Skull, the type, 9 young adult: basal length, 189.4 ; zygomatic width, 

 49.4; mastoid width, 36; width between orbits, 28.6; widtli across post- 

 orbital processes, 38.6; length of nasals, 42.4; greatest length of single 

 half of mandible, 58.2. 



Remarks. Mr. Brown has thus far sent two specimens of this agouti, 

 one, the type, a female, taken at Santa Marta, probably full grown, though 

 not quite adult, has the last molar on both upper and under jaw just com 

 ing into place. The other is a younger male taken at Pueblo Viejo at 

 8000 feet. Both agree perfectly in coloration. 



D. colombiana appears, so far as I can judge by descriptions, to be very 

 different in color from any of the neighboring species, the peculiar color 

 ing of the rump being distinctive. Unfortunately, through lack of ma 

 terial, I can say nothing of its cranial characters at present. 



Oryzomys flavicans illectus subsp. nov. 



Type from Pueblo Viejo, Colombia, altitude 8000 ft. No. 8101, tf adult, 

 coll. of E. A. and 0. Bangs. Collected March 24, 1898, by W. W. 

 Brown, Jr. 



General characters. Similar in size, proportions and cranial characters 

 to 0. flavicans Thomas, of Merida, Venezuela; differs in color of under 

 parts, which are a beautiful rich orange-buff to base of hairs the under 

 parts of true flavicans being whitish. 



Color. Upper parts, bright yellowish brown, about tawny -ochraceous, 

 a scattering of dark brown hairs along back and on top of head ; lower 

 sides and under parts orange-buff; usually a small white spot on throat ; 

 hairs of upper parts and sides slate gray at base, those of belly, chest and 

 throat unicolor for their whole length ; feet and hands buff. 



Measurements. The type, tf adult : total length, 292 ; tail vertebrae, 100 

 hind foot, 25 ; ear from notch, 17. Average of five adult topotypes, c^s 

 and ?s : total length, 279.4 ; tail vertebrae, 146.8 ; hind foot, 26 ; ear from 

 notch, 17.2. 



Tayaasu torvus sp. nov. 



Type from Santa Marta, Colombia. No. 8038, J* adult, coll. of E. A. 

 and O. Bangs. Collected Jan. 26, 1898, by W. W. Brown, Jr. 



General characters. Size smaller than either T. tajacu of southern Brazil 

 or T. angnlatus of Texas. Color and external characters as in those two 

 species. Skull smaller and otherwise different. 



Cranial and dental characters. Skull low, short and wide ; nasals short, 

 taken together, evenly rounded and rather flat ; malar crest continued 

 forward to canine alveolus. Molar teeth not wrinkled ; molars and pre- 

 molars all very large ; two small upper premolars molariform, quadrate 

 and quadritubercular ; the small anterior lower premolar with the for 

 ward large tubercule divided into two, like next premolar. In T. tajacu 

 this tooth has the forward large tubercule plain and single, differing in 

 this from the next premolar. 



The skull of T. /owt-s-can be distinguished from that of T. tajacu in the 

 extension of the malar crest forward to canine alveolus; in much larger 



