TABLE OF CONTENTS. 



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Introduction 



Artificial Key to the Genera 



Fam. MEGADERMATID^ . 

 Macrotus, Gray 



Macrotus californicus, Baird 

 Fam. NOGTILIONIDJE .... 



Nyctinomus, Geoff. 



Nyctinomus nasutus, Tomes 

 Fam. VESPERTILIONID^ 



Nycticejtts, Raf. 



Nycticejus crepuscularis, Allen 



Lasidkds, Raf 



Lasiurus noveboracensis, Tomes 

 Lasiurus cinereus, Alhn 

 Lasiiirus intermedins, Allen 



ScoTOPHiLOS, Leacli . 



Scotopliilus carolinensis, Allen 

 Scotophilus fuscus, Allen . 

 Scotophilus i-eorgianus, Allen 

 Scotophilus noctivagans, Lee. 

 Scotophilus hesperus, Allen 



Vespektilio, Keys, k Bias. 

 Vespertilio evotis, Allen 

 Vespertilio subulatus, Sat) . 

 Vespertilio affinis, Allen 

 Vespertilio lucifugus, Lee. . 

 Vespertilio yumanensis, Allen 

 Vespertilio nitidus, Allen . 

 Synotus, Keys. & Bias. 



Synotus macrotis, Allen 

 Synotus townsendii, Wagner 

 Antrozocs, Allen 



Antrozous pallidus, Allen . 



Appendix . 

 Alphabetical Index 



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71 



S3 



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