VAMl'IM. 459 



in front, lanceolate behind, the horizontal portion surrounding the 

 nasal apertures ; interfemoral membrane well developed ; tail gene- 

 rally distinct, rarely absent ; inner margin of the lips not fringed. 



Deatklon. Inc. -* or i, c. i^, pm. ?=? or fff, m. 5=|. 



Molars with W-formed cusps generally well developed ; premolars 

 very variable in size and in number (see remarks on teeth of Steno- 

 dermata, p." 511). 



Nearly all the species of Vampyri appear to be insectivorous, so 

 that the term applied to this group cannot be considered indicative 

 of their habits. A few, if not aU, probably supplement their insect 

 diet with fruit. Vampyrus spectrum is said to be wholly frugi- 

 vorous ; and Macrotus tvaterhousii, according to the observations of 

 Mr. Osburn (see p. 466), probably occasionally preys on smaU species 

 of Bats like Megaderma lyra of the Eastern Hemisphere, which it 

 resembles in many respects. 



The species included in this group may bo divided into two sec- 

 tions, according as the tail is produced to the hinder margin of the 

 interfemoral membrane or perforates it and appears upon its upper 

 surface. Those included in the first section fall naturally into three 

 apparently very distinct genera ; but those of the second section, 

 although they have been divided into several genera, founded on dif- 

 ferences in the form of the skaU and on the presence or absence of 

 the second lower premolar, yet present in their general conformation 

 so many characters indicative of close affinity that, but for the 

 reasons mentioned above, they would have been described here 

 under the same generic term. 



Synopsis of the Genera. 



I. Tail contained in and produced to the 

 hinder margin of the interfemoral mem- 

 brane, or extending slightly beyond it. 

 «. Wing-membrane attached to the base 

 of the calcaneum and to the inferior 

 surface of the tibia. 

 «'. Nose-leaf with erect processes in 

 front of the nasal orifices ; chin with 

 a. naked space above and a longitu- 

 dinal groove beneath it, bounded by 

 two naked prominences ; premolars 



^^, second lower premolar minute. 3. Lonchobhina, p. 401. 

 h. Wing-membrane from the outer side of 

 the tibia or foot. 

 b'. Nose-leaf simple in front ; chin with 

 a deep V-shaped groove in fi-ont, 

 bounded by raised naked promi- 

 nences; premolars ^^, second lower 



premolar weU developed 4. Maceotus p. 463. 



c'. Nose-leaf simple in front ; lower lip 

 and chin with a central naked space 

 in front, bounded by small warts ; 



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