162 PROCEEUIXGS OF THE ACADEM-J OF [IVIarcll, 



the other two genera by the greatly elevated brain-case, which 

 throws the basi-crauial axis almost at right angles to that of ros- 

 trum, and in the presence of prominent internal, basally annectant, 

 flaps to the eai's. 



After a study of the names applied to this section as a group, I 

 have concluded to designate the subfamily, containing Mormoops, 

 Chilonycteris and Dermonotus (Pteronotus Auct. ), as the Mor- 

 moopince, which term I have used in a previous paper. '^ The name 

 Lobostomince of Dobson is not available as Lobostoma is a synonym 

 of Mormoops and Chilonycteris. 



Key to the Forms. 



a. — Chin pad slightly divided. Cutaneous lap connecting the 

 inner side of the conch with the supraocular region united 

 with its fellow of the opposite side. 

 b. — Greatest thickness of the first upper premolar centrally 

 located, the tooth being crudely rhomboid in outline, 



blainvillii Leach. 

 ^5. — Greatest thickness of the first upper premolar posteriorly 

 located, the tooth being subconoid in outline, 



b. einnamomea (Gundlach). 

 act. — Chin pad considerably divided. Cutaneous lap connecting 

 the inner side of the conch with the supraocular region not 

 united with its fellow of the opposite side except at the 

 extreme base. 

 b. — First upper premolar narrow, centrally constricted, the 

 posterior margin well separated from the second pre- 

 molar, 

 e. — Second upper premolar triangular in basal outline, 

 equally broad as long, the internal lobe of the 

 tooth moderately developed, 



megalophylla (Peters). 



cc. — Second upper premolar much broader than long, the 



internal lobe of the tooth very much developed, 



m. senicula Ivehn. 



hb. — First upper premolar rather broad, subrectangular in 



outline, in contact Avith or very slightly seimrated from 



the second premolar, . . . m. intermedia ]\Iiller. 



Mormoops blainvillii Leach. 



1820. xVello Cuvieri Leach, Trans. Linn. Soc. Loudon, XIII, p. 71 



(founded on a badly mutilated specimen). 

 1820. Mormoops Blainvillii Leach, Trans. Linn. Soc. London, XIII, 



p. 77, tab. VII. 



^^Proe. Acad. Nat. Sci. PMla., 1901, p. 297. 



