SMITHSONIAN INSTITUTION 



UNITED STATES NATIONAL MUSEUM 

 Bulletin 144 



THE AMERICAN BATS OF THE GENERA 

 MYOTIS AND PIZONYX 



BY 



GERRIT S. MILLER, Jr. 



Curator, Division of Mammals, United States National Museum 

 AND 



GLOVER M. ALLEN 



Curator of Mammals, Museum of Comparative Zoology 

 Cambridge, Massachusetts 



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UNITED STATES 



GOVERNMENT PRINTING OFFICE 



WASHINGTON 



1928 



ISSUED MAY 2 5 1928 



