No. 9.— Bats of the Genus Corynorhinus. 
By GLovEerR 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 Zodlogy 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. m. intermedius, | am indebted to Dr. Joseph Grinnell and 
Mr. H. S. Swarth of the Museum of Vertebrate Zodlogy 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. C. D. Bunker of the 
University of Kansas Museum, Dr. H. L. Ward of the Public Museum 
