New Mammals from Santa Martd, Colombia. 



103 



hands • liil 1 white : tail indistinctly bicolor, brownish dusky above, grayer 

 below, clothed with very short appressed hairs. 



Cranial characters. — The skull as compared with that <>f M. murina dif- 

 fers in greater postorbital constriction and higher, heavier rostrum. The 

 nasals are broad and heavy, slightly arched, and the maxillaries some- 

 what swollen laterally. 



Measurements. — The type, rj 1 adult: total length, 325; tail vertebrae, 

 175; hind foot, 22 ; ear from notch, 24. An old adult $ topotype, No. 

 8139, total length, 325 ; tail vertebrae, 185 ; hind foot, 21 ; ear from notch, 

 24. Average often adults, rj and 9, topotypes, total length, 321.7; 

 tail vertebrae, 176; hind foot, 21.6; ear from notch, 24.3. 



Skull, the type, rf adult : basal length, 36.2 ; occipitonasal length, 39.4 ; 

 zygomatic width, 20.6; mastoid width, 14; width between orbits, 6.2 ; 

 length of nasals, 18.6; width of nasals, 5.2; greatest length of single half 

 of mandible, 29. 



Rt murk*. — Mr. Brown took twenty-seven examples of M. mitis at Pueblo 

 Viejo at 8000 feet altitude, but did not secure any at lower elevations. 

 M. mitis is probably nearest to M. murine, but differs in slightly smaller 

 size, in color, and in cranial characters. M. fuscata Thomas, of Merida, 

 Venezuela, is perhaps also somewhat closely related. It differs in having 

 the haiis of the under parts slaty at base and in its smaller size and dif- 

 ferent cranial proportions. 



Dasyprocta colombiana sp. now 



Type from Santa Marta, Colombia. No. 800S, $ young adult, coll. of 

 E. A. and O. Bangs. Collected Jan. 6, 1898, by VV. W. Brown, Jr. 



General characters. —Size medium ; general color dark ; hairs on back of 

 head and neck slightly elongated, but not forming decided crest; hairs 

 of rump black with white tips. 



Color and Pelage. — Hairs stiff and coarse; back, shoulders, and head, 

 black, each hair with an ochraceous band near tip, this hand shorter on 

 hairs of center of back and longer on those of sides; elongate hairs of 

 rump black with white tips ; under parts, center of belly, median line, and 

 throat whitish ; under side of neck and lower sides, hairs annulated like 

 those of back, hut the yellow bands rather paler ; legs and arms, feet and 

 hands black, slightly lined with yellow; ears sparsely haired, rather more 

 hairy at base than at tip, the hairs ochraceous. 



Measurements. 



