Bui. 68, Part II, Bureau of Entomology, U. S Dept. of Agriculture . 



Plate IV. 





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Trees Defoliated by Spring Canker-worms and Effects of Treatments. 



Vi)i. l. — Dfiiilialcd liv.s in Lupidii (.rch.iid. Fif,^ •_'.— The same tivosa year later. Fifr. :5.— Dofo- 

 liaterl tri'es iii the I'lucell <.i<liai(i. Kig. J.— An adjacent row ol" trees protected bv two appli- 

 cations ol arsenate ul' lead. tOrigiiia!.) " 



