BULLETIN 



OCT 1 1897 



OF THE 



Illinois state Laboratory 



NATURAL HISTORY, 



Urbana, Illinois. 



VOLUME V. 



ARTICLE II. — A CONTRIBUTION TO A KNOWLEDGE OF 

 NORTH AMERICAN FRESH-WATER CYCLOPID.E. 



By ERNEST B. FORBES, B. S. 



.Illinois State Laboratory of Natural History, 



UIJHAXA, ILLINOIS. 



"^1897. 



