SMITHSONIAN INSTITUTION 



UNITED STATES NATIONAL MUSEUM 

 Bulletin 143 



BIOLOGICAL AND TAXONOMIC 

 INVESTIGATIONS ON THE MUTILLID 



WASPS 



BY 



CLARENCE E. MICKEL 



Of the University of Minnesota 





am ^12-^ 



UNITED STATES , 



GOVERNMENT PRINTING OFFICE 



WASHINGTON 



1928 



\^m) APR 2 3 1928 



