168 CHIROPTEKA 



KEY TO THE EUROPEAN SPECIES OF MYOTIS. 



Size large (forearm 53 to 64 mm., condylobasal 

 length of .JiuU 18-6 to 23 "(5 mm., upjjer tooth- 

 row 8'2 to 10'6 mm.) ; middle upper premolar 

 normally crowded inward frour axis of tooth- 

 row ; third lower molar with second triangle 

 much smaller than first and noticeably different 

 from it in form. 

 Condylobasal length of skull 22 to 23*6 mm.; 

 mandible 17 "8 to 19 mm. ; maxillary tooth- 

 row 9"8 to 10 "6 mm. (Central and southern 



Europe) M. mijotis, p. 192. 



Condylobasal length of skull 18-6 to 21-4 mm. ; 

 mandible 15 ■ 2 to 17 • 2 mm. ; maxillary tooth- 

 row 8'2 to 9' 4 mm. (Mediterranean region) M. ox-ygnathus, p. 199. 

 Size smaller medium (forearm .34 to 47 mm., condy- 

 lobasal length of skull 12-4 to 16 "8 mm., upper 

 tooth-row 5 to 7 mm.) ; middle upper premolar 

 not crowded inward from axis of tooth-row ; 

 third lower molar with second triangle nearly 

 as large as first and essentially like it in 

 form. 

 Foot relatively large, obviously more than half 

 as long as tibia ; calcar about twice as long 

 as free border of interfemoral membrane ; 

 skull broad, the width of brain-case more 

 than half greatest length ; crown area of 

 molars relatively small ; upper molars with 

 evident protoconule. 

 Forearm about 47 mm. ; condylobasal length 

 of skull about 16 mm.. (Central and 



southern Europe) M. dasi/ciicme, p. 189. 



Forearm less than 45 mm. ; condylobasal length 

 of skull never more than 15 mm. 

 Tibia and adjacent membrane densely furred ; 

 forearm about 42 mm. ; condylobasal 

 length of skull 14-0 to 14-8 mm. (Medi- 

 terranean region) M. ccqxiccinii, p. 187. 



Tibia and adjacent membrane not furred ; 

 forearm about 35 mm. ; condylobasal 

 length of skull 13 '2 to 13*8 mm. 



(Distribution general) M. daubentonii, p. 184. 



Foot relatively small, about half as long as tibia ; 

 calcar about as long as free border of inter- 

 femoral membrane ; skull narrow, the width 

 of brain-case less than half greatest length ; 

 crown area of molars relatively large ; upper 

 molars without protoconule. 

 Ear not specially elongated, extending slightly 

 beyond nostril when laid forward. 

 Forearm about 40 mm. ; condylobasal length 

 of skull about 15 mm. ; posterior border 

 of ear conch with deep, almost angular 



emargination slightly above middle M. emarginatus, p. 177. 



Forearm about 34 mm. ; condylobasal length 

 of skull 12-6 to 13-2 mm.; posterior 

 border of ear conch with shallow, in- , 



conspicuous emargination M. mystacinus, -g. IGO. sj 



Ear elongated, extending conspicuously beyond 

 nostril when laid forward. 



