Bul. 68, Bureau of Entomology, U. S. Dept. of Agriculture. PLATE IV. 
TREES DEFOLIATED BY SPRING CANKER-WORMS AND EFFECTS OF TREATMENTS. 
Fig. 1.—Defoliated trees in Lupton orchard. Fig. 2.—The same treesa year later. Fig. 3.—Defo- 
liated trees in the Purcell orchard. Fig. 4.—An adjacent row of trees protected by two appli- 
cations of arsenate of lead. (Original. 
