Bui. 123, Bureau of Entomology, U. S. Dept. of Agriculture, 



Plate VIII. 



Fig. 1 .— Sugar-Beet Wireworms in Petri Dish, Killed by Bacteria in 

 Cultures of Agar. (Original.) 



Fig. 2.— a Root Cage Used in Rearing Young Wireworms. (Original.) 



