— 2 — 



Chiroptera. 



Vesperugo (Histiotus) velalus, Geoff, — San Francisco Mission, Pilcomayo, 

 Bolivia, 1. — Caiza, Bolivian Chaco, 9. — Tala, Salta, Argentina, 1. — San 

 Lorenzo, Jujuy, 1. 



Evidently a very common bat thronghuut the country traversed by 

 D' Borelli. It is curious to note how nearly every part of the world 

 has one long-eared bat about this size inhabiting it, and generaliy a 

 common, and therefore successfiil species. The present bat and its allies 

 in different parts of S. America, Plejotits Tnacroiis in N. America, P/e- 

 coius auritus in Europe, a species of Nijclms in Africa, Hipposideros 

 bicolor in the Orientai region, and Nyctophilus iimoriensis in Austra- 

 lasia. There is evidently a niche in Nature for such a form, and the 

 niche is filled by members of very different genera in different parts 

 of the world. 



Vesperugo (Eptesicus) fuscus, P. de Beauv. — Aguairenda Mission, Bolivian 

 Ghaco, 2. — Caiza, 6. — San Francisco, Pilcomayo, 6. 



These specimens are ali rather smaller tban is usuai, even in S. Ame- 

 rican examples of the widely distributed Serotine group. 



Atalapha cinerea, P. de Beauv. — Caiza, 1. — San Francisco, 1. 



Atalapha borealls frantzii, Peters. — Aguairenda, 1. — Caiza, I. 



Atalapha ega, Gerv. — Caiza, 6. 



This species seeras to be common ali over the S. American lowerlands. 

 Mr. Penens obtained it in some numbers at Goya. 



Vesperlilio nigrìcans, Wied. — Caiza, 8. — San Francisco, Pilcomayo. 



This species, no doubt on account of its house-haunting habits, occurs 

 in nearly every coUection that comes from tropical S. America. 



Molossus obscurus, Geoff. — Caiza, 1. 



Molossus temminckii, Lund. — S. Lorenzo, 1. 



Tliis species is generaliy loolied upon as a rare one, but is evidently 

 common in sòme places as Mr. R. Penens, while collecting small mam- 

 mais for the British Museum, found a colony of it, numbering some thirly 

 individuals, in an old tree at Goya, Corrientes. Every specimen, like the 

 present one, has two lower incisors only. 



1 add bere the name of two species sent for identification by the Museum 

 of Turin: 



Hemiderma brevicauda, Schinz, — Suo José dos Campos, Brazil, 1 . 



Lonchoglo3sa wiedii, Peters. — Sao José dos Campos, 3, 



This is by far the rarest bat in the collection, and the British Museum 

 has as yet received no specimens of it. These three examples are a little 

 smaller than D' Peters type, but there seems no reason to consider 

 them different. 



