llVb 



Bulletin 



Olf THE 



Illinois State Laboratory 



Olf 



Natural History 



Urbana, Illinois, U. S. A. 



STEPHEN A. FORBES, Ph.D., LUD., 

 Director 



Vol. IX. May, 1913 Article IX. 



BIOL,OGICAL AND EMBRYOLOGICAL STUDIES 

 ON FORMICID^ 



BY 

 MAURICE COLE TANOUARY, A.M. 



