BULLETIN 



OF THE 



Illinois Qtate Laboratory 



OF 



NATURAL HISTORY, 



Urbana, Illinois. 



VOLUME V. 



ARTICLE IV — THE NORTH AMERICAN CENTROPAGID.E 

 BELONGING TO THE GENERA QSPHRANTICUM, LIM- 

 NOCALANUS, AND EPISCHURA. 



By FREDERICK WILLIAM SCHACHT, B. S. 



Illinois State Laboratory of Natural History, 

 URBANA, ILLINOIS. 



1898. 



