Mammals from Jnjioj. 189 



1. Eptesiciis hilatrei, Geoff. 



S. Yufco, Rio San Francisco (in spirit). 

 Forearm 44 mm. 



2. Myotis nigricans, Wied. 



cJ . Yuto, Rio San Francisco (in spirit). 

 Forearm 33 mm. 



3. Molossops iemmmckii, Barm. 



cJ . Yuto, E,io San Francisco (in spirit). 



Forearm 30 mm. 



This bat is the type of the genus MolossopSj as selected and 

 fixed by Miller *. 



But it appears to me that tlie other species hitherto in- 

 cluded in Molossops ought to be generically distinguisiied 

 tVom it. For while in that genus, as represented hy tem- 

 minckii, there are only two lower incisors, m^ is compara- 

 tively normal, of triangular shape, with a well-marked third 

 commissure, and W3, in correlation, has a normal triangular 

 ))osterior lobe, with two cusps, the other species all differ in 

 tiiese respects. I would therefore suggest they should be 

 distinguished under the following name : — 



Cynomops, gen. no v. 



Genotype, C. cerastes "f [Molossus cerastes, Thos.]. 



General characters as in Molossops, with the following 

 exceptions : — 



Lower incisors 4. M"^ simplified |, with no third com- 

 missure, the tooth transversely oblong, scarcely broader 

 externally than inlernally. il/-; equally simplified, the poste- 

 rior lobo linear, with one cusp only. 



Other species : C. planirostris^ Pet., hrachymehs, Pet., 

 mastivusj 'I'hos., and par anus, Thos. Molossops milleri, Osg., 

 also presumably comes here, as it is comparcid with plani- 

 rostris, but it is of about the size of M. temmincHi, which is 



* Fain. Gen. Hats, p. 247 (1907). 



t I should naturally have selected planirostria as genotype, but speci- 

 mens from 80 many localities (including Buenos Ayres) have been 

 assigned to that species that there is always a little doubt about its exact 

 identity. Moreover, the large co-a»/cs contrasts better than ;;/fl/u'/o*7r/.v 

 with the little temminckii as a representative of the genus which con- 

 tains all the large species of the group. 



X Peters's beautiful plate oi planirostria (Chiropt. Mus. Zool. iJerl. 

 pi. 18 \\) shows the structure of tne molars very well. 



