

BOLLETTINO 



D«I 



Musei dì Zoologìa ed Anatomìa comparata 



(lelln il. IJiiirersitrt di Torino 



N. S±5 piil)l)Iicat.o il 18 Aprile 1898 Vor. XIII 



Viaggio del Oott. A. Sorelli nel Chaco Boliviano e nella Republica Argentina. 



XII. 



On the small mammais 



coUected 1)y 1)' Borelli iu Bolivia iiiid Northern Argentina 

 Oldfield Thomas 



British Mtiseum. 



By the kindness of Prof. Camerano of the Turin Museum I have been 

 entrusted with the small inammalia collected b}' D"" Borelli in the Chacos 

 of Southern Bolivia and Northern Argentina, and as few mammais 

 have e ver been obtained from this region it is hoped that the present 

 list may be of service in improving our knowledge of (he distribution 

 of S. American bats and rodents. 



Unfortunately although the total number ofspecimens brought is con» 

 siderable, a large proportion of them are either the introduced Afus 

 musculus, or else, j^oung specimens incapable of determination. 



On the whole the collection shows that the Paraguay and La Piata 

 fauna stretches up northwards along the Pilcomayo valley right into 

 Bolivia, and there seems to be no trace of any peculiar locai element. 



Of course a few northern and more tropical forms creep in, such as 

 Sturmia, etc. but these do not affect the general character of the 

 collection, which is on the whole strikingly similar to that from so much 

 furtber south in La Piata. 



The only previons list of the mammais of this region that I am aware 

 of is one published (*) by D' Matschie of a collection made in Jtijuy 

 and elsewhere by D' Paul Neumann. 



(*) S. B. Ges. nat. Beri., 1894, p. 57. 



