51, Bureau of Entomology, U. S. Dept. of Agriculture. 



Plate IX. 



Effects of Weevil Feeding Upon Bolls. 



Fig. 36, Small boll showing 13 feeding punctures; fij;. 37, section of medium-sized injured boll: 

 a, Feeding puncture closed by woody growtfi: b, gelatinized area resulting from feeding punc- 

 tures; tig. 38, boll having two locks destroyed by two feeding punctures made by a male weevil; 

 fig. 39. device used to test relative attractiveness of American and Egyptian squares— figs. 36, 

 38, reduced to three-fourths natural diameter: fig. .39, one-fourth natural diameter (original). 



