(leer. 



SMITHSONIAN INSTITUTION 



UNITED STATES NATIONAL MUSEUM 



Bulletin 61 



-' "7 6. 



yARIATIONS AND GENETIC 

 RELATIONSHIPS OF THE 

 GARTER-SNAKES . 



BY 



ALEXANDER G. RUTHVEN 



Curator of the University Museum, University of Michigan, Ann Arbor 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 



1908 



