On a neio Species of Euneomys from Patagonia. 127 



with internal black dot and black spot at the end, a medial 

 and discal transverse series of black spots, a marginal series 

 of black lunules ; body and legs concolorous with the wings. 



Expanse of wings, lj 7 ^ inch. 



Hab. Fergusson Isl., Tobriand Group, Papua. 



Genus Perata, nov. 



Male with a slight tuft of hair on inner side of 2nd joint 

 of palpi and very large tuft on inner side of 3rd joint ; 

 antenna? ciliated : fore wing with the costa arched, outer 

 margin oblique, wing long and somewhat narrow ; a large 

 costal fold : hind wing ample, outer margin rounded, veins 

 3 and 4 from angle of cell ; section iv. of Hampson's group 

 of the genus Adrapsa. 



Type, Perata curiosalis, Swinhoe, Ann. & Mag. Nat. Hist. 

 (6) xv. p. 16 (1895). 



XVIII. — A new Species of Euneomys /row Patagonia. 

 By Oldfield Thomas. 



(Published by permission of the Trustees of the British Museum.) 



AMONG some small mammals which, through the kind inter- 

 mediary of Dr. R. Dabbene, the British Museum owes to the 

 authorities of the Zoological Museum, Buenos Ayres, is an 

 example of a new species of Euneomys, which may be called 



Euneomys dabbenei, sp. n. f 



Size very much less than in other species. Fur soft and 

 fine, hairs of back about 6-7 mm. in length. General colour 

 pale neutral grey slightly tinged by the buffy brown of the 

 ends of the hairs, but nothing like so strongly as in E. chin- 

 chilloides. Under surface greyish white, the bases of the hairs 

 deep slaty, the ends faintly tinged with buffy or cream, not 

 strongly buffy as in chinchUloides. Hands and feet pure white. 

 Tail markedly bicolor, blackish above, white below. 



Skull conspicuously smaller than that of E. chinchillvides , 

 broader and shorter in proportion. Interorbital region with 

 sharply square but not beaded edges. Palatal foramina large, 

 with sharp raised edges round them, their hinder edge level 

 with the middle o£ in 1 . 



