COLLECTED IN DUTCH NEW GUINEA. 321 



This fine species represents the U. macrojms group at middle altitudes in the 

 Snow Mountain region. It differs from all its allies by its dark coloration, the result 

 no doubt of the saturate conditions in which it lives. 



While smaller in all respects than the giant black-tailed species U. anaJc and 

 TJ. rothschildi it is larger than any of the other yellow-tailed forms. 



From the next species, its representative in the lowlands, it differs by its larger 

 size, more yellow tail, whiter underside, and more normal-shaped skull. 



It is in all probability the " different and hitherto unknown mammal " referred to in 

 Jentink's 1911 report (p. 172) under the heading of Pogonomys muWjplicatus. 



17. f Ueomys scaphax Thos. 

 2 S (young). Mimika E. 



6 ? . Launch Camp, Setakwa R. 20'. 



2 ? . Canoe Camp, Setakwa R. 150'. 



Described Ann. & Mag. N. II. (8) xii. p. 209 (1913). No. 206 (B.M. no. 13. 6. 18. 8) 

 the type. 



This second large species is related to the Aru Island U. aruensis by the structure 

 of its skull, but has the more normal coloration of the Papuan species instead of 

 the rich rufous of its Aru ally. 



1 8. f Uromts lorentzii Jent. 



6 cJ , 4 ? . Mimika R. 



3 d , 2 6 . Iwaka R. 

 2 6 . Wataikwa R. 



7 c? , 5 ? . Canoe Camp, Setakwa R. 



19. Uromts naso Thos. 



2 . Whitewater Camp, Kapari R. 4000'. B.M. no. 11. 11. 11. 54. Type. 

 d . No. 3 Camp, Iwaka R. 



Described Ann. & Mag. N. H. (8) vii. p. 386 (1911). 



The distinction of this Uromys from U. lorentzii is perhaps rather doubtful. The 

 two skulls of it in the collection are, however, markedly larger than those of any 

 of the considerable series of that animal. 



20. f Uromts stalkeri calidior Thos. 

 7 d, 11 $ . Mimika R. 



cj . Wataikwa R. 



$ . Iwaka R. 



5 d , 3 -9 • Launch Camp, Setakwa R. 



Described Ann. & Mag. N. H. (8) vii. p. 387 (1911). No. 3013 (B.M. no. ILll. 

 11.36) the type. 



A local form of the U. stalkeri of British New Guinea. 



