494 PHYLLOSTOMID^. 



on the Tipper surface extending upon the wing-membrane nearly as 

 far as a line drawn from the middle of the humerus to the knee ; a 

 few fine very short hairs appear upon the fleshy part of the forearm ; 

 the legs and the interfemoral membrane behind the extremity of the 

 tail are naked ; beneath, the membranes are almost quite naked. 



Upper inner incisors unicuspidate, converging inwards and touch- 

 ing by their extremities; outer incisors very small; lower incisors 

 small, with notched crowns, the middle incisors broader than the 

 outer ones : first upper premolar nearly equal to the second in cross 

 section, and much exceeding it in vertical extent ; its anterior mar- 

 gin convex, touching the canine ; its posterior margin concave, sepa- 

 rated by a considerable interval from the short cusp of the second 

 premolar : first and second upper molars nearly equal, with small 

 internal horizontal basal projections much less developed than in 

 Phyllostoma, and narrow W- shaped cusps with obtuse inner angles ; 

 last upper molar small, triangular in cross section, scarcely one third 

 the size of the second molar, placed on the root of the zygomatic 

 process ; lower premolars nearly equal in vertical extent and in 

 cross section ; molars rather narrow, progressively slightly smaller 

 from before backwards. 



Skull comparatively longer than in Phyllostoma Jiastatum, and 

 more narrowed in front. Zygomatic arch deficient, represented by a 

 small process of the maxUlary bone in front and by a corresponding 

 process of the temporal bone behind (Plate XXVI. figs. 5, 5 a). 



Length, head and body 2", tail 0"-5, interfemoral membrane in 

 the centre 0"-9, head 0"-9, ear 0"'75, tragus 0"-25, forearm l"-6, 

 thumb 0"-5 ; third finger — metacarp. 1""45, 1st ph. 0"-7, 2nd ph. 

 0"-85, 3rd ph. 0"-5; fourth finger— metacarp. l"-4, 1st ph. 0"-5, 

 2nd ph. 0"-5 : fifth finger— metacarp. l"-45, 1st ph. 0"-5, 2nd ph. 

 0"-5 ; tibia 0"-6, calcaneum 0"-3, foot 0"-5. 



Hah. Neotropical Eegion, apparently generally distributed from 

 Mexico to Sta. Catherina in Southern BrazU, and throughout the 

 West Indian Islands. 



This species forms a connecting link between the groups Vampyri 

 and Olossophagce, resembling many of the species of the latter 

 group (especially those of the genus Phyllonycteris) in the narrow- 

 ness of the molars and in the imperfect zygomatic arches. So 

 closely does it resemble Glossophaga soricina externally that it has 

 often been confounded with that species. 



