1899-] Allen, JVew Rodents from Colombia and Venezuela. 213 



Pelage full, soft, and long. Color above dark fulvous brown, finely grizzled 

 with black-tipped hairs ; nose and frontal region darker than back, grayish 

 fulvous strongly mixed with black ; below strongly washed with fulvous, the 

 pelage basally plumbeous ; chin and throat whitish, the hairs white to the 

 base ; upper surface of feet dingy gray ; ears medium, thinly haired, many of 

 the hairs slightly tipped with fulvous ; tail blackish, unicolor, nearly naked 

 except apically, where it is thinly clothed and slightly penicillate. 



Measurements. Type, total length, 270 mm. ; head and body, 131 ; tail 

 vertebrae, 139 ; hind foot, 25, with claws, 27 ; ear, 19. 



Skull, total length, 32 ; basal length, 25 ; zygomatic width, 17 ; mastoid 

 width, 12.3 ; interorbital width, 5.1 ; length of nasals, 1 1 ; palate, 6 ; palatal 

 foramina, 5.7 ; upper toothrow, 5 ; lower jaw, condyle to incisor tips, 20.3 ; 

 angle to condyle, 9 ; lower toothrow, 5.6. Supraorbital bead strongly devel- 

 oped. 



Oryzomys fulviventer is based on a single adult female, from 

 Quebrada Secca, Venezuela (altitude about 3000 feet). Its 

 fulvous underparts, combined with its size and proportions, dis- 

 tinguish it from any other species described from either Venez- 

 uela or Colombia. It is certainly not O. flavicans Thomas, from 

 Merida. What its relations may be to forms from Guiana and 

 Brazil I am unable to say, but, on the basis of geographical con- 

 siderations, it is not likely .to prove identical with any species 

 from these faunally very different regions. 



Sciurus saltuensis bondae, subsp. nov. 



Sciurus variabilis BANGS, Proc. Biol. Soc. Washington, XI, 1898, 184. 

 (Not of I. Geoffrey.) 



Type, No. 15234, ? ad., Bonda, Santa Marta District, Colombia, July 4, 

 1899 ; Coll. H. H. Smith. 



Winter or Breeding Pelage. General color (in the type) of the upper parts, 

 limbs externally, and the tail, deep red ; ventral surface, including the inner 

 side of the fore limbs nearly to the wrist and of the hind limbs nearly to the 

 ankle, pure white ; sides of the head below the eyes, mouth parts, and throat, 

 fulvous ; top of the head, superficially red like_the back, but with most of the 

 hairs subapically annulated with black, giving a slight dingy cast in contrast 

 with the body ; also the hairs of the lower back and base of the tail are 

 annulated below the surface with black ; tail hairs entirely deep red from base 

 to tip, without trace of black annulations. In other specimens the tail hairs 

 are narrowly, or in some cases broadly, banded with black. 



Summer or Post-breeding Pelage. General color above yellowish red varied 

 with black, resulting in a generalolivaceous effect, the hairs individually being 

 annulated near the tips with yellowish red and black ; ventral surface and the 

 tail as in the winter pelage. The fore limbs, a narrow lateral line, the inner 



