348 Mr. G. E. Dobson on a Natural 



Vespertilionidae. 

 Not divisible into subfamilies. 



EmballonuridsB. 



I. Tail slender, perforating tbe interfemoral membrane and ap- 



pearing upon its upper surface ; legs long, fibula very slender ; 

 premaxillary bones generally separated by an interval in front ; 

 incisors weak Emballonurinse. 



II. Tail thick, produced considerably beyond the short interfemoral 



membrane * ; legs very short and stout ; fibula well developed ; 

 premaxillary bones close together in front or united ; upper in- 

 cisors strong Molossinse t- 



Phyllostomidae. 



I. Nostrils on the upper surface of the muzzle, surrounded by cuta- 



neous appendages ; chin with warts .... Phyllostominse. 



II. Nostrils in the front of the muzzle, opening by simple apertures 



near the margin of the upper lip ; chin with erect cutaneous 

 ridges Lobostomin*. 



Synopsis of Groups of Allied Genera. 



Fam. Rhinolophidae. Genera. 



C Ccelops, Blyth. 



Subfam. Phyllorhininae 



J Phyllorhina, Bonap. 

 I Rhinonycteris, Gray. 

 [_ Tricenops, Dobson. 

 Subfam. Rhinolophinae Hhinolophus, GeoftV. 



Fam. Nycteridse. 



Subfam. Nycterinae Nycteris, Geoffr. 



Subfam. Megaderminae Meyaderma, Geoffr. 



Fam. VespertilionidsB. 



A. Crown of the head fiat or slightly raised 

 above the face-line ; upper incisors close 

 to canines. f Antrozous, Allen. 



I Nyctophilia, Leach. 

 a. Ears very large, generally united. | Otonycteris, Peters. 



Group Plecoti . . <( Coritiorhinus, Allen. 



Plecotus, Geoffr. 

 Synotus, Keys. & Bias. 

 Histiottis, Gervais. 



* Except in Mystacina tuberculata. 



t These subfamilies nearly correspond to the families Brachyura and 

 Molossi of Peters, and to the Vespertilionidae (in part) and Noctilionidae of 

 Gray. The genera of Emballonuridse, however, with the exception of Rhi- 

 nopoma and Noctilio, are so connected that any attempt to divide them 

 into subfamilies must be very artificial. The genera fall naturally into 

 six groups, which I shall define further on. 



