On Two neio Sciuropteri /Vom Borneo. 275 



XXXVI. — Descriptions of Two new Sciuropteri discovered by 

 Mr. Charles Hose in Borneo. By Oldpield Thomas. 



Sciuropterus Thomsoni, sp. ri. 



Similar in size and essential characters to 8. Horsjieldi^ 

 but with the general colour of the head and upper surface 

 dark smoky brown, finely grizzled with dull bufty white, this 

 latter colour replacing the bright fulvous or rufous found in 

 the allied species. Underside whitish or pale fulvous. Ears, 

 hands, feet, and tail as in S. Horsjieldi, or, at least, as in 

 " S. Davisoni''^ "^^ for the type of S. Horsjieldi is so faded 

 that the colours " cannot be determined with certainty. 

 Mammte 6. 



Skull and dentition as in the allied species. No upper 

 p.^ present. 



Dimensions of the type (measured in the flesli by ]\[r. 

 Hose) : — 



Head and body 231 millim. ; tail 199 ; hind foot 37, with 

 claws 40*5 ; ear 22. 



Skull : greatest length 46*5 ; basilar length 37 ; greatest 

 breadth 29'6 ; nasals 13 x 7*2 ; length of upper molar 

 series 9*2. 



Hab. Baram District, Eastern Sarawak. Type from the 

 Bakong River. 



Type. Female. B.M. no. 99. 12. 9. 34. Collected August, 

 1897, and presented by Charles Hose, Esq. Three specimens 

 examined. 



By the request of Mr. Hose I have named this very hand- 

 some flying-squirrel, which is distinguished from its only near 

 ally by its very different body-colour, after Mr. Thomson, 

 the energetic Managing Director of the Borneo Company. 



Sciuropterus Hosei, sp. n. 



Size small, about as in 8. setosus. Fur as usual very soft 

 and fine. General colour above dark, the tips of the dorsal 

 hairs washed with fawn or rufous fawn ; flanks and top of 

 parachute from wrists to ankles black, the lighter tips to the 

 hairs disappearing laterally. No special tufts of bristles 

 on cheeks or round ears. Centre of face like back ; a darker 

 line running through eye to base of ear; below this the 

 cheeks are pale rufous white ; behind posterior base of ear a 

 prominent white patch. Ears very long and narrow, nearly 

 twice the length of those of 8. setosus. Under surface dull 

 white, with a slight rufous tinge, but how much of this is 

 * Described and figured P. Z. S. 1886, p. 74, pi, vi. 



18* 



