202 Mr. O. Thomas on sinall Mammals 



C. Eiineomys micropus ahus, subsp. n. 



J. 171, 177, 183, 188, 201, 202. Maiten, W. Cliubut. 

 700 in. 



Similar in all essentials to true E. micropus, as represented 

 by series from Koslowsky (Int. 4G° S.) and Rio Chico, but 

 almost or quite Avitliout the strong butfy suffusion on the fur, 

 the general tone being more slaty greyish. Under surface 

 also clearer greyish, with but little buffy wash. 



Dimensions of the type (measured in the flesh) : — 



Head and body 123 mm.; tail 117; hind foot 27; 

 ear 18. 



Skull : greatest length 31*3 ; condylo-incisive length 28'7 ; 

 zygomatic breadth 18; palatal foramina 7*8; upper molar 

 series 5*7. 



Uab. as above. 



Ti/pe. Adult male. B.M. no. 18. 12. 2. 13. Original 

 number 177. Collected 23rd April, 1918. 



Tlie series with which these specimens have been compared 

 includes specimens killed in February, June, August, and 

 December, so that the difference in the general colour is 

 evidently not a seasonal one. 



I may note here that my reference of Mus (^PhyUotis) 

 .xaitthopypus, Waterhouse, to the genus Euneoviys — a refer- 

 ence probably induced by the noticeable resemblance it bears 

 to E. micropus — novr proves to be erroneous, as it is certainly 

 a Phyllotis, the most southern member of that widely distri- 

 buted genus. Its narrow incisors readily distinguish it from 

 E. micropus, Avith which it is found. 



The local raodilication in colour shown by this subspecies 

 is exactly as in the Ahrothrix suffusus of the same region. 



7. EUgviodontia morgani, All. 



S . 142, 159, 165, 166 ; ? . 125, 154, 157, IGO, 161, 163, 

 1G4. PilcaiiLU, Upper Kio Negro. 



"Common. Lives in holes at the foot of the bushes." — 

 E.B. 



8. Ahrothrix suffusus modestior, subsp. n. 



(?. 176, 182, 193, 203, 204, 211, 214, 217 ; ?. 172. 

 Maiten. 



Like typical suffusus of th^ Koslowsky region, but rather 

 darker and more slaty grey, the reddish or buffy of tiie back 

 reduced both in extent and brightness. Face almost without 

 buffy. Sides quite without buffy, so that there is a broad 



