Bui. 344, U. S. Dept of Agricultur 



Plate II. 



Fig. 1 .—Caged Thurberia Plants Infested with Weevils. (Original.) 





*&$£»■ 



Fig. 2.— Cages Over Cotton Plants Used in Studies on Weevil Activity. 



(Original.) 



TYPES OF REARING CAGES SIMULATING NATURAL CONDITIONS, 

 USED IN STUDIES ON THE BIOLOGY OF THE ARIZONA WILD 

 COTTON WEEVIL. 



