SMITHSONIAN INSTITUTION 



UNITED STATES NATIONAL MUSEUM 

 Bulletin 61 



VARIATIONS AND GENETIC 



RELATIONSHIPS OF THE 



GARTER-SNAKES 



BY 

 ALEXANDER G. RUTHVEN 



Curator of the University 3/itsetnn, University oi Michigan , Ann Arbor 





.^"^$14^ 





. WASHINGTON 



GOVERNMENT PRINTING OFFICE 



1908 



