No. 9. — Bats of the Genus Corynorhinus. 

 By Glover M. Allen. 

 Introduction. 



Specimens of the Big-eared Bats of the genus Corynorhinus have, 

 until very lately, been few in museums, and most of those available 

 to previous writers have been preserved in alcohol, so that they were 

 of little value in determining color variation. The desirability of 

 bringing together a large series of skins for comparison was emphasized 

 twenty years ago by Miller (1897) in his review of the Vespertilionidae 

 of North America, but no later attempt at a revision of the genus has 

 been made. Thanks to the generous interest of Professor Theodore 

 Lyman, the Museum of Comparative Zoology has lately acquired a 

 small series of these bats from southeastern California, and the identi- 

 fication of these and other specimens in the Museum has induced me 

 to undertake a general review of the genus. I have been fortunate 

 in being able to assemble most of the skins and skulls available in 

 American museums, some 126 specimens in all, covering practically 

 the entire known range of these bats. 



Acknowledgements. 



My thanks are due to the officers of several institutions for the loan 

 of specimens under their charge, and particularly to Mr. H. W. 

 Henshaw, Chief of the Biological Survey of the U. S. Department of 

 Agriculture and to Mr. Gerrit S. Miller, Jr., of the U. S. National 

 Museum for use of the series in the unrivalled collections at Washing- 

 ton. For the loan of valuable material from California, including the 

 type of C. VI. intermedins, I am indebted to Dr. Joseph Grinnell and 

 Mr. H. S. Swarth of the Museum of Vertebrate Zoology of the Uni- 

 versity of California. Acknowledgements are also gratefully made to 

 the following persons and institutions: Dr. J. A. Allen and Mr. R. C. 

 Andrews of the American Museum of Natural History; Mr. W. H. 

 Osgood of the Field Museum of Natural History ; Mr. Junius Hender- 

 son of the University of Colorado Museum; Mr. CD. Bunker of the 

 University of Kansas Museum, Dr. H. L. Ward of the Public Museum 



