Bui. 539, U. S. Dept. of Agriculture. 



Plate II. 





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jp 



Feeding Tubes and Cocoons of the Lesser Corn Stalk-Borer. 



Pigs. 1, 2. — Feeding tubes attached at entrance to tunnels, at base of sorghum stalks. Fig. 3. — 

 Cocoon opened, showing pupa in situ. Fig. 4.— Cocoons, with and without exit tubes. (Orig- 

 inal.) 



