Mammals from Jujuy. 189 
1. Eptesicus hilatrei, Geoff. 
3. Yuto, Rio San Francisco (in spirit). 
Forearm 44 mm. 
2. Myotis nigricans, Wied. 
3. Yuto, Rio San Francisco (in spirit). 
Forearm 33 mm. 
3. Molossops temminckii, Burm. 
3. Yuto, Rio San Francisco (in spirit). 
Forearm 30 mm. 
This bat is the type of the genus Molossops, as selected and 
fixed by Miller *. 
But it appears to me that the other species hitherto in- 
cluded in Molossops ought to be generically distinguished 
from it. For while in that genus, as represented by tem- 
minckit, there are only two lower incisors, m* is compara- 
tively normal, of triangular shape, with a well-marked third 
commissure, and m3, in correlation, has a normal triangular 
posterior lobe, with two cusps, the other species all differ in 
these respects. JI would therefore suggest they should be 
distinguished under the following name :— 
CYNOMOPS, gen. nov. 
Genotype, C. cerastes T | Molossus cerastes, Thos. ]. 
General characters as in Molossops, with the following 
exceptions :— 
Lower incisors 4. J? simplified {, with no third com- 
missure, the tooth transversely oblong, scarcely broader 
externally than internally. 4/; equally simplified, the poste- 
rior lobe linear, with one cusp only. 
Other species: C. planirostris, Pet., brachymeles, Pet., 
mastivus, 'lhos.,and paranus, Thos. Molossops milleri, Osg., 
also presumably comes here, as it is compared with plani- 
rostris, but it is of about the size of WM. temminckii, which is 
* Fam. Gen. Bats, p. 247 (1907). 
+ I should naturally have selected planitrostris as genotype, but speci- 
mens from so 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 cerastes contrasts better than planirostris 
with the little temmincki as a representative of the genus which con- 
tains all the large species of the group. 
¢ Peters’s beautiful plate of planirostris (Chiropt. Mus. Zool. Berl. 
pl. 18 B) shows the structure of the molars very well. 
