EXPI.ANATION OF PLATES. 



Plate I. — You?ig willow whips injured by the cotlonwood 

 leaf-beetle. 



Plate II. — Uninjured willow whip and one which was in- 

 jured at a early in season causing it to branch. 



Plate III. — i. Willow leaves showing eggs attached and in- 

 jury by young larvcB. 2. Larva natural size and enlarged. 

 J. PupcB attached to willow leaf., natural size. 4.. Pupa eiilarged. 

 5. Beetles natural size and etilarged. 



Plate IV. — Machine for catching the beetles. 



Plate V. — Machine in position ready for use. 



Plate VI. — Hand power machine. 



