60 Ml. (). Tliomas on Mammals from 



2. Xasua socin/is, Wied. 



Four. 



'I'hree of these specimens are of tlie greyisli type ami one 

 of the blackish. 



I provisionally use Wied's term tor tlie South- Brazilian 

 JS'asua, but one of the many earlier names will very possibly 

 prove available tor it. 



i\. Sciurns Ingrami, Thos. 

 Sixteen specimens. 



One. 

 One. 



4. Sectomys squamipes^ Bts. 



5. Ovyzomys ratticeps^ Hens. 



6. Oryzomys dorsalis. Hens. 



Six. 



Some indication of the dark dorsal line is present in all 

 these specimens. 



With regard lo Leche's ^^ H. dorsalisj var. obscura,^^ one ot" 

 Mr. llobert's skins (no. b26) is darker, and its tail is oidy 

 equal to its head and body combined ; but this specimen is 

 immature and has clearly only the usual darker colour of 

 youth. Perhaps the same explanation would apjdy to 

 Dr. Leciie's dark-coloured " variety." 



7. Oryzomys eliurus, Wagn. 

 Six. 



^Vagne^'s IJesperomys pygmcBus is a synonym of 0. eh'urus, 

 its type specimen, which 1 have examined in Vienna, being a 

 young individual of the present form. 



8. Akodon cursor, Wingc. 



2 cJ. 



A. cursor was described from Lagoa Santa, one of the 

 co-types being now in the British Museum. Mr. Robert 

 obtained a number of specimens at Piquetd and Cruzeiro, Sao 

 Paulo, and Rio Jordao, Minas. Dr. von Ihering has sent us 

 an example from the island of Siio Sebastian, and now 

 Mr. Robert has found it in Paraiid,. It is also probably the 

 ^^ JJ. arem'cola? '^ of Hen?el and Lechc, at least so far as 

 regards the specimens with a basilar length of 23 millim. or 

 u])wards ; those about 20 or 21 probably bi-long to the next 



