190 On a neio Free-tail Bat. 



Akodon pulchem'mus inambarii, Thos. 

 Limbane. Simons (as above). 



Dactyloniys peruanusj All. 



Proechimys Simonsi\ Thos. 



Dasyprocta variegata, Tscliudi. 



(J ? , Marcapata. J. Kalinowski. 



Iliis Aguti sctms to grade northwards into 1). isthmica^ 

 intermediate specimens occurring along tlie Andes of Ecuador. 

 Examples from the Santa Marta Mountains, representing 

 r>. cohmhtana^ Bangs, are also very similar to Peruvian skins. 



Dideljjhi's pernigra, Allen. 



cJ, Marcapata. J. Kalinowski. 

 ? , Limbane. Simons. 



Marmosa Keaysi^ Allen. 



Chi'ronectes minimus, Zimm. 



XXII. — A new Free-tail Bat from the Lower Amazons. 

 By Oldfield Thomas. 



Promops Trumbulli, sp. n. 



Closely allied to P. perotis, Wied, but with smaller ears, 

 smaller tragus^ and much smaller and lighter teeth. 



Ears more moderate than in P. p)^^'otis, united at their 

 anterior bases, hairy in the same parts as in P. perotis, but 

 not so thickly ; keel less broadly flattened externally ; tragus 

 quadrangular, nearly or quite as broad as high, about 

 2 millim. in each dimension, so far as can be made out on the 

 skin. 



General colour above more " hair-brown " than the rufous- 

 brown of P. perotis. Under surface whitish brown, paler 

 along the middle line ; the long hairs on the throat whitish 

 grey ; face and chin blackish brown. 



Skull similar to that of P. pierotis except for its generally 

 lighter build, and this may be partly due to immaturity. 



Teeth in shape similar on the whole to those of the allied 



