Subgenera of the Sciuropterus Group. 7 



cliaracter, were it not that 8. fuscocapillns and S. thomasi 

 tend to be intermediate in tliis respect between Petinomys 

 and Ilylopetes. 



The following new members of the group may be here 

 described : — 



Delomys trichotiSj sp. n. 



External characters apparently very much as in B. pearsont, 

 though the cars of the single specimen seem to be a little 

 larger and more heavily tutted, and the hairs of the chest 

 are whitish without the slaty bases present in all our other 

 specimens of the group. 



Skull with the nasals not surpassing posteriorly the frontal 

 processes of the ])reuiaxiilaries. 



Molars conspicuously lighter than in B. pearsont, the tooth- 

 row not much shorter, but so much narrower that the palate- 

 breadth between the premolars exceeds the combined length 

 of p^ and m^, while in pearsoni the same breadth only equals 

 the length of // + half that of m}. The teeth themselves are 

 of essentially the same pattern, but owing to their smaller 

 size appear much more finely sculptured. 



Dimensions of the type (measured in skin) : — 



Head and body IDG mm.; tail 151 ; hind foot 32-5. 



Skull: fronto-parietal suture to tip of nasals 28; nasals 

 12*2 x6"5; interorbital breadth 8"1 ; intertemporal breadth 

 9'6 ; palatilar length 20; diastema 9"5 ; distance between 

 inner sides of p^ 5'2 ; length of tooth-series 9, of molars 

 only 6-2. 



llab. Manipur. Type from Machi. 



Type. Adult male. J3.M. no. 85. 8. 1. 136. Collected 

 7th May, 1881. Presented by Allan O. Hume, Esq. 



Fleromyscus borneanus, sp. n. 



Very closely allied to the IMalaccan P. puherulentus, 

 Giinth,, to which, without examination of the skull, I have 

 hitherto referred it. External characters very much as in 

 that species, the upper colour of the same blackish brown 

 flecked with light, but the light rings on the hairs which 

 form the fleckings are smaller and more nearly white. Under 

 surface of the body and of tiic basal third of the tail clearer 

 whitish, without the subdued butfy or " clay-coloured " 

 suffusion found in pulverulentas. 



Skull rather larger than that of puheruhntus, the brain- 

 case broader, and both the interorbital and intertemporal 

 spaces noticeably wider. 



