190 On anew Free-tail Bat. 
Akodon pulcherrimus tnambarti, Thos. 
Limbane. Simons (as above). 
Dactylomys peruanus, All. 
Proechimys Simonsi, Thos. 
Dasyprocta variegata, Tschudi. 
3 ¢, Marcapata. J. Kalinowski. 
This Aguti seems to grade northwards into LD. dsthmica, 
intermediate specimens occurring along the Andes of Ecuador. 
Examples from the Santa Marta Mountains, representing 
D), colombiana, Bangs, are also very similar to Peruvian skins. 
Didelphis pernigra, Allen. 
3, Marcapata. J. Kalinowski. 
?, Limbane. Simons. 
Marmosa Keays, Allen. 
Chironectes minimus, Zimm. 
XXII.—A new Free-tail Bat from the Lower Amazons. 
By OLDFIELD THOMAS. 
Promops Trumbull, 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. perotis, 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. perotis 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 
