SMITHSONIAN INSTITUTION 

 UNITED STATES NATIONAL MUSEUM 



Bulletin 143 





BIOLOGICAL AND TAXONOMIC 

 INVESTIGATIONS ON THE MUTILLID 



WASPS 



BY 



CLARENCE E. MICKEL 



Of the Urtiversiiy of Minnesota 



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-PR 23 ]928 



UNITED STATES 



GOVERNMENT PRINTING OFFICE 



WASHINGTON 



1928 



