BULLETIN 



OF THE 



Illinois Qtate Laboratory 



OF 



NATURAL HISTORY, 



Urbana, Illinois. 



VOLUME V. 



ARTICLE VIII.— A STATISTICAL STUDY OF THE PARA- 

 SITES OF THE UNIOFTIDM. 



BY H. M. KELLY, A. M. 



Illinois State Laboratory of Natural History, 

 URBANA, ILLINOIS. 



March, 1899. 



