AUG 2 l^f^^ 



Artlbeus planiroslris, Spix. — Caiza, 1. 

 Sturmia lilium, Geoff. — Caiza, 2. 

 Desmodus rufus, Wied. — Caiza, 1. 



!Rodentia. 



Oryzomys callosus, Reugg. — S. Francisco, Pilcomayo,6. — S. Lorenzo, Jujuy, 3. 

 — Rio Apa, Upper Paraguay, 3. 



This species is evideiitly common throughout the upper part of the 

 Parana Valley. Reugger obtained it iiear the junction of the Paraguay 

 and Parana, Mr. Penens has sent it from Goya, while the present col- 

 lection carries its known range up the Pilcomayo into Bolivia. No doubt, 

 like the next one, this will prove to he one of Azara's species, but 

 until a certain identification can be made, it may pass under Reugger's 

 name. 



Oryzomys laucha, Desm. — Aguairerida Mission, Bolivian Chaco, l. — Tala, 

 Salta, Argentina, 5. 



This little species also extends to whole lenght of the river system, 

 from D' Borelli's Bolivian locality, through Goya, where it was obtained 

 by Mr. Penens, and Buenos Ayres, where Azara got it, down at ieast 

 to La Piata City, where I myself found it very common. 



At the last named place it inhabits the Museum park and the fields 

 round the town and a specimen or two raay generally be kicked out 

 from under any heap of weeds of faggots left lying about the houses. 

 Adult specimens are however by no raeans easy to obtain, and the great 

 majority of those I saw and trapped were little more than half grown. 



Oryzomys longìcaudatus, Burm. — Aguairenda Mission, Bolivian Cliaco, 2. — 

 S. Francisco, Pilcomayo, 1. — S. Lorenzo, Jujuy, 2. — Rio Apa, Upper Pa- 

 raguay, 1. — Resistencia, Argentine Chaco, L 



Phyllotis griseofla/us, Waterh. — S. Francisco Mission, Pilcomayo, 1. 



Phyllotis, sp. 



Too young for determination. 



Acodon olivaceus, Waterh. — Caiza, 1. — S. Louis, Argentina, I. 



Besides the above there is one specimen of Mus rattus and no less 

 than 16 of Mus musculus, not to mention 16 more small murines, ali 

 so young, that even if they are not also Mus musculus they are not 

 worth the labour of identification. 



No doubt D' Borelli was unable to do much trapping out in the open 

 country, and had to trust largely to what he couid catch in and near 

 houses. He therefore naturally obtained an unusual proportion of intro- 

 -duced house-haunting Mus musculus. 



