Sciuvufi, Rliipidomjs, &c. from Venezuela. 35 



Skull : greatest length 32"5 ; basilar length 26 ; inter- 

 orbital breadth 5-5 ; interparietal 4*7 X 9'7 ; palate length 13 ; 

 diastema d)'6) palatal foramina 7; length of upper molar 

 series 4"5. 



Hah. La Union, Lower Orinoco. 



Type. Male. B.M. no. 4. 5. 7. 34. Original number 305. 

 Collected 23rd October, 1902, by Mr. S. M. Klages. Two 

 specimens, adult and immature. 



The large number of the common R. venezuelce of Merida 

 with which I have been able to compare this animal agree in 

 the uniformly larger size of their molars, and also average 

 much paler in colour. 



Ehipidomys rosilla, sp. n. 



A small rufous species allied to R. dryas, Thos. 



Size about as in R. dryas, or slightly larger. Fur close, 

 straight, and crisp, hairs of back scarcely more tlian 5 mm. in 

 length. General colour above rich tawny, the crown and 

 anterior back more greyish and heavily lined with black, the 

 rump and hips deep uniform tawny. Throat and chest 

 wiiite. Belly buffy ochraceous, paler mesially, an area of 

 richer ochraceous tawny edging the darker colour of the 

 sides ; but tliere is no siiarp line of demarcation. Inguinal 

 region and inner side of hind limbs white. Ears of medium 

 size, brown. Upper surface of hands and feet dull buffy 

 white. Tail rather short for this genus ; uniformly brown, 

 well-haired, pencilled terminally. 



Skull very much as in R. dryas ^ the palatal foramina 

 rather larger. 



Dimensions of the type (measured on the dry skin): — 



Head and body lOO^mm. ; tail 101 ; hind foot (s. u.) 20-5; 

 ear 13'5. 



Skull : greatest length 2S ; basilar length 21'3 ; zygo- 

 matic breadth 15"5 ; nasals 9; interorbital breadth 5; 

 breadth of brain-case 12*8 ; palate length 11'7 ; diastema 7'4 ; 

 palatal foramina 5"4 ; length of upper molar series 3'8, 



Hah. La Union, Lower Orinoco. 



Type. Old male. B.M. no. 4. 5. 7. 37. Original number 

 310. Collected 26th October by Mr. S. M. Klages. Two 

 specimens. 



This pretty species is readily distinguishable by its small 

 size and rich colour. Its only near ally, R. dryas, from 

 Ecuador, has the belly pure white, without any trace of the 

 unusual ochraceous suffusion characteristic of the present 

 animal. 



3* 



