Bui. 50, Bureau of Entomology, U. S. Dept. of Agriculture. 



Plate X. 



Work of Bollworm in Cotton Bolls. 



Fig. 1, Bollworm eating into a half-grown cotton boll, twice natural size: fig. 2, bollworm boring 

 into a full-sized cotton boll, slightly enlarged; fig. 3, full-grown bollworm and its work in large 

 cotton boll, somewhat enlarged; fig. 4. cotton boll only partially destroyed by bollworm, two 

 "locks" open, the others destroyed, natural size (original). 



