?>i Mr. O. Thomas on new 



Tail long, not so bushy as in some members of the group, its 

 hairs for the proximal six inches ringed basally with black 

 and dull yellow, with broad flaming orange tips, which 

 gradually spread downwards till on the terminal half of tlie 

 tail the hairs are wholly orange to their bases. MamnifB 8. 



Skull stout and heavy, its muzzle not abnormally narrow. 



Dimensions of the type (measured in the flesh) :• — 



Head and body 285 mm. ; tail 313 ; hind foot, s. u. 65, 

 c. u. 70 ; ear 31. 



Skull : greatest length 68 ; basilar length 53 ; zygomatic 

 breadth 40 ; nasals 21 X 10*5 ; interorbital breadth 23; palate 

 length 29"5 ; length of upper tooth-series lO'l. 



Hob. La Union, Canra district. Lower Orinoco. 



T^pe- Female. B.M. no. 4. 5. 7. 28. Original number 

 308. Collected 24th October, 1902, by Mr. S. M. Klages. 

 Presented by Oldtield Thomas. One specimen in normal 

 pelage, and a second, presumably the same, showing a 

 partially melanoid condition, with blackish tail and black belly. 



This fine squirrel is most closely allied to S. igniventris 

 (type locality Marabitanas, Rio Negro), but differs by its 

 pure white instead of bright red under surface and by the 

 wholly orange-red colour of the terminal half of the tail. 

 The latter character will also distinguish it from the geogra- 

 pliically more distant >S'. tricolor and S. castas, the only other 

 white-bellied members of the group. S. igniventris tcedifir 

 (Upper Rio Meta), with a somewhat similar tail, has, hke 

 its typical subspecies, a wholly red belly. 



Rlupidomys venezuelce fervidas, subsp. n. 



Stronger coloured and with smaller teeth than true B. vene- 

 zuehe. 



General colour above uniform rich fulvous (near "tawny 

 ochraceons ^^) ; under surface pure sharply defined white. 

 Outer side of limbs like body, inner sides white ; hands bufFy 

 white, with a slight touch of brown on the metacarpus ; feet 

 similar, but the . centre of the metatarsus more decidedly 

 brow n. Tail uniformly brown, hairy and pencilled terminally 

 as usual. 



Skull very similar to that of true Venezuela?^ but the inter- 

 parietal shorter ant ero- posteriorly and the palatal foramina 

 rather longer, extending fully to the level of the front edge 

 of n/^. Teeth as usual, but decidedly smaller than in the 

 typical form. 



Dimensions of the type (measured in skin) : — 



Head and body 130 mm.; tail 135; hind foot (wet) 

 (s. u.) 27; ear 17. 



