-1908.] DR. KNUD ANDERSEN ON BATS. 311 



Summary of characters of Genera, Species, and Subsjjecies. 



■a. Skull long and slender; rostrum but very slightly 

 depressed : height at p^ greater than, or equal to, 

 width of skull at postorbital constriction ; bonj' 

 palate long : distance ti'om palation to front of 

 incisors about equal to zygomatic width ; median 

 backvvardly extending portion of bony palate long, 

 equal to combined length of m^ and m^ ; anterior 

 nasal opening less oblique. Outer upper incisors 

 bifid ; cusp 2 of mi small ; molars | ; m^ larger 

 (than in Artiheiis), situated in row behind (not 

 postero-internallj' to) m", almost as broad as 

 hinder border of m-; cusp 5 of m- situated near 

 the labial margin of the tooth. A narrow line of 



whitish fur down the middle of the back Ueodekma, p. 212. 



«'. Length of skull (to front of c) 22-23-3 mm. ; 

 upper teeth (c-m-*) "'o-S'o. Length of ear-conch 

 (outer margin) 15'7-16'8 ; width of horseshoe 



6-2-7-5. (S. Brazil and Peru to Costa Rica.) ... U. bllohatiim, p. 217. 

 61. Length of skull (to front of c) 24-7-24-8 mm. ; 

 upper teeth (c-m^) 8'9-9. Length of ear-conch 

 (outer margin) 18-18'5 ; width of horseshoe 



7-8-8. (Bolivia.) U. tJiomasi, -p. 221. 



h. Skull short and broad; rostrum considerabl}' de- 

 pressed : height at p-* much less than width of 

 skull at postorbital constriction ; bonj' palate 

 short : distance from palation to front of incisors 

 much less than zygomatic width ; median back- 

 wardlj' extending portion of bony palate short, 

 much less than combined length of m^ and m^ ; 

 anterior nasal opening more oblique. Outer upper 

 incisors simple (not bifid) ; cusp 2 of nii strongly 

 developed, raised as a high slender cone near the 

 middle of the lingual margin of m^ ; molars f, f, 

 or |. No white longitudinal dorsal stripe. 

 c^. Median upper incisors simple (not bifid) ; molars 

 I ; m^ and ms larger (mg equal to about \ of m2) ; 

 m^ situated in row behind (not postero-in- 

 ternally to) m^ ; cusp 5 of m- situated near the 

 lateral margin of the tooth. Tragus with a 



pointed projection on inner margin near tip Enchisthenes, p. 221. 



■d^. Median upper incisors bifid ; molars f , f , or f ; 

 m^ and m3 (when present) smaller (m^, if not 

 wanting, equal to g-yV of m^) ; m^, if not want- 

 ing, situated postero-internally to m'-^ ; ciisp 5 of 

 m^ moved lingually so as to occupy (precisely or 

 nearl}') the middle of the posterior margin of the 

 tooth. No pointed projection on inner margin 



of tragus near tip Aetibeus, p. 224. 



a^. Molars |. 



d^. Teeth small : upper row (c-m^) about 

 7*2 mm. Rostrum shorter. Forearm 



50 mm. (Guiana, Brazil.) A. concolor, \). 232. 



b^. Teeth larger : upper row (c-m^) 9-5-12 mm. 



Rostrum longer. Forearm 53-7-73 mm. 



a'^. Tibia and distal part of interfemoral so 



short-haired as to appear almost naked ; 



colour of fur of upper side not drab. 



Upper teeth (c-m^) 9-8-12 mm. ; forearm 



55-73 mm A. planb'ostris, p. 234. 



aP. Smaller. Length of skull (to front of c) 

 27-30 mm. ; zygomatic width 16-2- 

 19-2 ; upper teeth (c-m-) 9-8-11. Fore- 

 arm 55-652. 

 «''. Average length of skull (to front of c) 

 28-5 mm. ; average zygomatic width 

 17*6. Average length of forearm 61'8. 

 (Continental : Brazil to S. Me.xico) ... A. p. ■planirostris, p. 237. 



