MAMMALS VESPEKTILIONIDJE COliYNORIIINUS. 83 



FAM. VESPEBTILIONIDAE. 



Ordinary Bats. 



CHARS. Host rum unappendaged, or with lateral fleshy excrescences. Alar mem- 

 branes ample. Tail completely inclosed in the femoral membrane, or only its last joint 

 exserted. 



The foregoing is a partial expression of the characters of our largest 

 family of bats, to which all our remaining species belong ; it readily dis- 

 tinguishes them collectively from either of the foregoing. The species of 

 Corynorliinus is immediately recognized by the curious excrescences on the 

 chaps and the big leafy ears ; the other genera we adopt rest mainly upon 

 dentition. In our generic arrangement, we differ somewhat from Dr. Allen, 

 considering certain changes desirable ; as we do also in the number of species 

 we think proper to admit, being satisfied that a material reduction is necessary. 



Analysis of North American VESPERTILIONID^E. 



I. Cheeks excrescent ; ears immense, etc. : 



Genus COKYNORHINUS. 



II. Cheeks simple: 



a. Incisors, ,- ---- Genus ANTROZOUS. 



** ^ 



b. Incisors,* 5 : ..- ...... Genus ATALAPHA Molars, ^tf. Subg. Nycticejns. 



o o o o 



KK 



Molars, - .. Subg. Lasiurus. 



o _ o A * 



c. Incisors, ~ ...... Genus VESPERTILIO Molars, |^. Subg. Vesperus. 



O~ *O i ~- 



5 5 

 Molars, ^- . Subg. Vesperugo. 



O O 



55 

 Molars, --.. Subg. Vesperides.] 



Molars, - .. Subg. Vespertilio. 



Genus CORYNORHINUS, Allen. 



Synotits and Plecotus of some authors; not Synotm of KEYS, and BLAS., Wiegmann's 



Arch., 1839. 

 Corynorliinus, H. ALLEN, Proc. Acad. Phila., 1865, 173. 



CHARS. Teeth: I., |^; C., ] -; P. and M., ^ = 1 = 36. Upper incisors 

 o o 11 o (x 1-0 



separated at middle line, the centrals larger than laterals ; both canines with minute 

 * Incisors of the adult dentition ; the young are stated to have 3-,. 



o o 



1 Coues, new suhgenus. 



