344 Report of the Entomologists. \ 



EXPLANATION OF PLATES. 



Plate XVIII. — Young willow whips injured by the cotton- 

 wood leaf -beetle. v 



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

 jured at a early in season causing it to branch. 



Plate XX. — 1. Willow leaves showing eggs attached and in- 

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

 8. Pupae attached to willow leaf, natural size. 4- Pupa en- 

 larged. 5. Beetles natural size and enlarged. 



Plate XXI. — Machine for catching the beetles. ' 



Plate XXII. — Machine in position ready for use. 



Plate XXIII. — Hand power machine. 



