On Mammals from N.E. New Guinea. 669 



LXXXTI. — Oi} }f<iminah collected hy C. Keysser in the 

 Soriiwat/ed <md liawlinxon A fountains Ref/ion of N.E. 

 New (Juinca. By Oldfield Thomas. 



(Published by permission of the Truatees of tlie British Museum.) 



By tlie kindness of Lord Rothschild I have had the opportunity 

 of working out a number of mammals which were collected 

 .some years ago in the projecting eastern part of what was tiien 

 German New Guinea by the Dutch Missionary, C. Keysser. 

 The British Museum had never received any mammals at all 

 from tiiis region, while the few that have been recorded are 

 themselves mostly from Mr. Keysser's collections, determined, 

 and in some cases described, by Prof. F. Forster, sometimes in 

 conjunction with Lord Rothschild. 



The present collection is mostly from the great mountain 

 mass known as the Saruwaged Mountains, of which the better- 

 known Rawlinson Mountains are said to be mere outliers. 



But from the mammal point of view, the Saruwaged and 

 Rawlinson Mountains are almost equally unworkod, so that 

 the present collection is of very great interest, and adds 

 materially to our present imperfect knowlege of New Guinea 

 mamn^als. 



1. Mallomys hercules, Thos. 



S , R.M. 9. Saruwaged Mts. 



Only the second known specimen of this fine rodent, the 

 first, the type, having been given to the Museum by Lord 

 Rothschild in 1912. 



2. Anisomys imitator^ Thos. 

 (J , R. 22 (imm.). No exact locality. 



3. Stenomys rufulus, sp. n. 



R.M. 18, 19. Saruwaged Mts., 4000 m., August 1914. 



A small species of a reddish colour. 



Size and essential characters as in S. niohe, but colour 

 strongly rufous. Upper surface uniform strong cinnamon- 

 brown, sides scarcely paler, under surface sayal-brown, the 

 hairs slaty for about two-thirds their length. Head and ears 

 quite like body. Hands and feet darker brown. Tail 

 apparently shorter than in niobe, but doubtfully perfect in 

 the type. 



Skull apparently as in njy^e, the supraorbital edges smoothly 



