350 



Mr. G. E. Dobson on a Natural 



Fam. Phyllostomidse. 

 Subfam. Lobostominae. 



Group 1. Mormopks 



( Chilonycteris, < 

 , < Pteronotus, Gr«,j . 

 [ Mormops, Leach. 



Gray, 

 ay. 



Subfam. Phyllostominae. 



A. True molars present ; upper incisors 4. 

 a. Muzzle long ; outer side of true molars 

 with W-formed cusps. 

 a'. Tongue moderately long, termina- 

 ting in an obtuse tip ; upper sur- 

 face of the lower lip Jiot divided 

 in the centre. 



Group 2. Vampyri < 



\ Macrotus, Gray. 



Lonehorhina, Tomes. 



Macrophylhnn, Gray. 



Vampyrus, Geoffr. 



Schizostoma, Gervais. 



Lophostoma, D'Orb. 



Traehyops, Gray. 



Phyllostoma, Peters. 



Carullia, Gray. 

 [ Rhinophylla , Peters. 

 Tongue very long, much attenuated 

 towards the tip ; upper surface 

 of the lower lip divided by a f Glossophaga, Pall. 



Monophyllus, Leach. 



Ischnoglossa, Sauss. 



Phyllonycteris, Gundl. 

 j Lotichoglossa, Peters. 

 l_ Glossonycteris, Peters. 



Artibeus, Leach. 

 Phyllops, Peters. 

 Vampyrops, Peters. 

 Stenoderma, Geoffr. 

 Pygoderma, Peters. 

 Ametrida, Gray. 

 Chiroderma, Peters. 

 Sturnira, Gray. 

 BrachyphyUa, Gray. 

 Centurio, Gray. 



deep groove in the centre. 

 Group 3. Glossophagje 



Muzzle short, broad and obtuse ; 

 outer side of true molars with a 

 notched cutting-edge. 



Group 4. Stenodermata 



B. No true molars ; upper incisors 2. 

 Group 5. Desmodontes . . 



f Desmodus, Wied. 

 \ Diphylla, Spix. 



In the accompanying Diagram I have represented thefamilies 

 of Microchiroptera diverging along two distinct lines of descent 

 from some ancestral group now extinct, which I have for con- 

 venience designated Palseochiroptera. These allied families 

 form two natural alliances, which may be called the Vesper- 

 tilionine and Emballonurine alliances respectively ; and these 

 alliances correspond very closely to their geographical distri- 

 bution, to which I shall refer particularly hereafter. 



The Vespertilionidse and Emballonuridas are evidently con- 

 nected through the genera included in the groups Mimopteri 

 and Emballonurae, more particularly by the genera Natalus 

 and Furia — not directly, however, but most probably through 

 the family or group, now extinct, referred to above. 



