354 Mr. O. T!ioniii3 on 



but not the species described umlor that name by Thouidon, 

 which is very distinct and occurs in India, Burma, &c., and 

 not, so far as I know, in China. 



2-4. Oberea, sp. 

 One example. 



In addition to the species enumerated above the collection 

 contains one example referable to a new genus allied to 

 Merionceda. 



XLVIII. — Descriptions of Tioo new Murines from Peru and 

 a new Hare from Venezuela. By Oldfield ThomaS. 



Oryzomys prcetor^ sp. n. 



Allied most nearly by proportions and skull-characters to 

 0. aureus^ Tomes, and O. princeps, Thos., but wholly different 

 in colour. General appearance somewhat that of a small 

 Neotoma. 



Size large. Fur long, soft, close, and thick ; hairs of back 

 13-15 raillim. in length. General colour olivaceous fawn- 

 grey, much darkened on the middle and posterior back by 

 the numerous black ends to the longer hairs. Head, cheeks, 

 shoulders, and flanks clearer yellowish grey. Under surface 

 buffy white, quite without line of demarcation ; slaty bases 

 of hairs showing through ; groins with a fulvous suffusion. 

 Ears of medium size, blackish brown, much darker than the 

 general colour. Outer sides of limbs like sides, inner like 

 belly ; upper surface of hands and feet uniform silvery white. 

 Tail slightly longer than head and body, thinly haired, not 

 pencilled, very finely scaled, the rings running about sixteen 

 to the centimetre ; its colour uniformly brown above, rather 

 paler below. 



Skull on the whole very similar to that of 0. princeps^ but 

 with rather a broader and flatter braiu-case and narrower and 

 more parallel-sided interorbital region. Nasals rather broader. 

 Outer plate of zj'goma-root more projecting, so that the ante- 

 orbital notch is better defined. Interorbital region narrow, 

 parallel-sided, flat above ; its edges square but not sharply so, 

 traceable across the parietals to the outer corners of the inter- 

 parietal, but not forming sharp ridges or beads. Interparietal 



