On new Species 0/ Reitlirodon &c.from Argentina. 473 



LXIV. — Ne%o Species of Reitlirodon, Al)roconia, and Scapte- 

 Yomys from Argentina. By Oldfield ThoMAS. 



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



A. A FURTHER Collection from Sr. Eudin. 



After making- the collection in Jtijuy, of which an account 

 was given in February ^, Sr. Budin went back to Catamarca, 

 and paid further visits to Chunibicha and Otro Cerro^ localities 

 at which he had obtained so many interesting novelties in 

 1018. Lists of specimens from both places have already 

 been published t, and I now only propose to describe two 

 more novelties from Otro Cerro, additional to the previous 

 list, tugetiier with a couple of other new forms oi Reithrodon. 



Attention should be again called to the fact that Otro Cerro 

 is not in Rioja, as erroneously stated in the title to my earlier 

 paper, but is in Catamarca, about 18 km. N.N.AV. of 

 Ciiumbicha. 



The discovery of a second Argentine species of Ahrocoma, 

 quite different from that of Jujuy, is the most notevvortiiy 

 result of the fresh collection. 



Reithrodon caurinus, sp. n. 



A buffy rabbit-rat with whitish belly and nearly white 

 tail. 



General colour more strongly buffy than usual. Back 

 cla3'-coloured heavily lined with the black ends to the longer 

 hairs. Sides, or at least a band bordering the under colour, 

 bufl'y, often ochraceous buff, the rump also more or less of 

 tiiis colour. Under surface whitish, not sharply defined 

 laterally, but alnu st entirely without the buffy or cinnamon 

 found in all the other species, the sternal region only beiii"- 

 dull buffy ; hairs broadly slaty at base except in the inguinal 

 region, where they are wholly white. Head and ears with 

 the piebald markings characteristic of the genus particularly 

 well developed. A strongly marked bully supraorbital line, 

 and distinct patches at the bases of the ears. Proectote 

 blackish ; metentote buffy. Hands and feet white ; soles 

 more naked than in the s.iuthern species, the hairs ceaaino* 

 entirely behind the posterior pads. Tail white, the darker 

 colour of its upjK-r side reduced to a narrow inconspicuous 

 line. 



• Ann. & Mnp. Nut. lli>t. (i») v. p. 18)^ (liW). 

 + Op. rit. (t») iii. pp. 115 .'^ 48U (|!>li»). 



