126 



INSECTS INJURIOUS TO STAPLE CROPS. 



injuries to corn in Illinois were so severe as to demtind 

 investigation. At tliat time it was stated by several 

 farmers that the larvae had been noted feeding on corn- 



FiG. 11. — Diahroiicd longicornis Say. a, beetle; h, larva — Western 

 corn root-worm; c, pupa; d, egg; d' , portion of egg enlarged 

 (X40); e, mandible of larva; /, Lead of larva from above. Hair- 

 lines at sides natural size. (Redrawn from Forbes.) 



Fig. 72. — a, Diahrotien 12-punctata Ollv. Beetle of Southern corn 

 root-worm; b, Diabrotica mttata Fab. Striped Cucumber- 

 beetle. (Redrawn from Forbes.) 



roots for ten or twelve years, and that serious damage had 

 been done for at least seven years. Thus it is evident that 

 in all probability the injuries to corn commenced in 

 Missouri and Kansas during the early ^70's, and, as soon 



