BULLETIN 



of the 



ILLINOIS NATURAL HISTORY SURVEY 



THEODORE H. PRISON, Chief 



The Caddis Flies, 

 or Triclioptera, 

 of Illinois 



HERBERT H. ROSS 



Printed by Authority of the 



f^AWHAl - STATE OF ILLINOIS 



"t '*'<^/~i//?r\?(//j|,7-y DWIGHT H. GREEN, Governor 



^EP n iqDEPARTMENT OF REGISTRATION AND EDUCATION 

 ' '^^d FRANK G. THOMPSON, i)»V^c/or 



//5PA 



9K 



