L90 Bangs — A New Sigmodon from Colombia. 



haired on outside; skull with wide nasals and large, wide, incisive foramina 

 (teeth too worn to show characters well), otherwise not differing much 

 from the skull of the type species, S. hispidus. 



< 'olor. — Upper parts dull tawny-ochraceous, becoming darker and more 

 russet on rump, and lined with blackish tipped hairs, which are most 

 numerous along back ; hairs plumbeous at base, except a few sprinkled 

 over back and sides, which are yellowish-white throughout their entire 

 length ; * nose and cheeks wood brown ; under parts dull wood brown to 

 whitish, the plumbeous under fur showing through ; upper surface of feet 

 and bands dark gray; tail very hairy, dusky above, dull grayish below. 



Measurements. — Type, total length, 282; tail vertebrae, 115; hind foot, 

 32 ; ear from notch, 20. No. 8250, $ adult, from Palomina : total length, 

 290; tail vertebra?, 120; hind foot, 30; ear from notch, 17. 



Skull, type, basal length, 32; occipitonasal length, 36.4 ; zygomatic 

 width, 19.2; mastoid width, 14; interorbital width, 5.6; length of nasals, 

 13.2; breadth of nasals, 4.2. 



* This character is shown equally by both specimens, and gives a pecu- 

 liar grayish cast to the fur. 



