51 



THE CORN WIREWORM. 

 Melanotus cribulosus Lee. 

 For injuries by wire- worms see Forbes, 18th Rpt St. Ent. 111., 

 pp. 27-51, 1894. 

 Exhibit: Adult and figure. 



THE COMMON WIREWORM. 



Melanotus communis Gyll. 

 For injuries by wire-worms see Forbes, 18th Rpt. St. Ent. 111., pp. 

 27-51, 1894. 

 Exhibit: Adult. 



TWELVE-SPOTTED CUCUMBER-BEETLE. 



Diabrotica duodecempunctata Oliv. 



For general articles see Forbes, 18th Rpt. St. Ent. 111., pp. 146-154, 

 1894; Chittenden, Bui. 43, Div. Ent., U. S. Dept. Agric., pp. 12-13, 

 1903; Quaintance, Bui. 26, n. s., Div. Ent., U. S. Dept. Agric., pp. 

 35 -40, 1900. 



Exhibit: Adult and figure. (See also, under "Injuring the Ears.") 



THE NORTHERN CORN ROOT- WORM. 



Diabrotica longicornis Say. 



For general account see Forbes, 18th Rpt. St. Ent. 111., pp. 154-165, 

 1894. 



Exhibit: Adult and figure. 



INJURING THE YOUNG PLANT. 



CORN BILL-BUGS. 



For general articles on corn bill-bugs see Forbes, 16th Rpt. St. 

 Ent. 111., pp. 58-74, 1890; Bui. 79, 111. Agr. Expt. Sta., 27 pp. 1902. 



THE CLAY-COLORED BILL-BUG. 



Sphenophorus scqualis Linn. 



(Treated as S. ochreus Lee, by Forbes, 1. c.) 

 Exhibit: Adult and figure. 



NORTHERN CORN BILL-BUG. 



Sphenophorus zese Walsh. 

 (Generally called by authors S. scidptilis.) 

 Exhibit: Adult and work. 



THE TENACIOUS BILL-BUG. 



Sphenophorus pertinax Oliv. 



Exhibit: Adult. 



THE BLUE-GRASS BILL-BUG. 



Sphenophorus parvulus Gyll. 

 Exhibit: Adult. 



