MAMMALS— VESPERTILIONID^— COIiYNORIIINUS. 



83 



Fam. vespertilioxidae. 



Ordinary Bats. 



Chars. — Rostrum 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 

 CorynorMms is immediately recognized by the curious excrescences on the 

 chaps and the big leafy ea rs ; 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 Vespeetilionidje. 



I. Cheeks excrescent ; ears immense, etc. : 



Gen ns Corynorhinus. 



II. Cheeks simple : 



a. Incisors, — = 



. . . Genus Antrozous. 



b. Incisors,* 



1-1 



4-4 



Genus Atalapiia —Molars, Jz?.—Subg. Nycticejus. 



c. Incisors, 



o-a 



Molars, - — .. — Subg. Lasiurus. 

 ti-0 



.Genus Vespertilio — Molars. - — — Subg. Vesperm. 



o-o 



Molars, — =• — Subg. Vesperugo. 



o-a 



Molars, 1— . .. — Subg. Tespm'des.t 

 Molars, '^- \. — Subg. Vespertilio. 



Genus CORYNORHINUS, Allen. 



Synotus and Plecotus of some authors; not Synotas of Keys, and Blas., Wiegmann's 



Arch., 1839. 

 Corynorhinus, H. Allen, Proc. Acad. I'hila., 1SG5, 173. 



1-1 



Chars.— Teeth : I., ~— ; G, _ L ; P. and M 



J-o ' 1-1 



0-0 



1(! 

 20 



36. Upper incisors 



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



* Iucisor.s of the adult dentition ; the young are stated to have 



3-3 

 1 Coues, new subgenus. 



