SciiiniJ, UIilpnltMiiys, (fr.yVom ]'enc:ite/<i. !l.) 



Skull: jjivatcst lcnp:tlj ai'O ; basilar Icii^tli 2G ; inl.-r- 

 orbital breadth .rT) ; int.Tpari.-tal l-7xJ)-7 ; \)n\ate lLMi;rtli l.l; 

 dins(«'ina S'); palatal toramiiia 7; leiigtli of Ujjpi-r molar 

 serit's iT). 



Ilab. \j\ Union, Ij()u'i»r Orinoco. 



Ti/ju\ Male. M..M. no. 4. 5. 7.34. Original niinibor :J(t5. 

 CulK'ctccl 2;Jril October, 1902, by Mr. S. M. Kla-cs. Tuo 

 specimens, adult and iininaturo. 



Tlie lari,a» number of the common 11. venezuehe of Mcrida 

 with which I have been ablo to comjjare this animal a<^reo in 

 tlie unitiirinly lar^^er size of their molars, and also average 

 much paler in colour. 



RhipiJomys rosi/la, sp. n. 



A small rufous species allied to R. dnjas^ Thos. 

 8ize about as in R. dryas^ or slightly larger. Fur close, 

 straight, and crisj), hairs of ()ack scarcely more than ") mm. in 

 length. General colour above rich tawny, the crown and 

 anterior back more greyish and heavily linetl with black, the 

 rump and hips deep uniform tawny. Throat and chest 

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

 richer ochraceous tawny edging the darker colour of the 

 sides ; but there is no sharp line of demarcation. Inguinal 

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

 size, brown. Upper surface of bands and feet dull butly 

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

 well-haired, j)encilled terminally. 



iSkull very much as in R. dryas, the palatal foramina 

 rather larger. 



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

 11. -ad and body 109 mm. ; tail 101 ; hind foot {<. u.) 20-.'); 

 ear WV'y. 



{Skull : greatest length 23 ; basilar length 2T3 ; zygo- 

 matic breaiJth 15'5 ; nasals 0; interorbital breadth .'3; 

 breadth of brain-case 128 ; palate length 11*7 ; diastema 7*4 ; 

 palatal foramina 5*4 ; h.Migth of upper molar series 3'8. 

 Hub. La Union, Lower Orinoco. 



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

 310. Collected 2Gth October by Mr. S. M. Klages. Two 

 specimens. 



Tliis j)retty species is readily distinguishable by its small 

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

 Ecuador, has the belly j)ur(^ white, witiiout any trace of tho 

 unusual ochiuccous sulfusion characteristic of the present 

 animal. 



3* 



