Bui. 11 7, Buieiu of Entomology, U. S. Dept. of Agriculture. 
Plate III. 
Fig. 1.— Spraying Hopvines with Power Outfit. (Original.) 
Fig. 2.— Applying Precipitated Sulphur in Dust Form as 
a Remedy Against the Red Spider. (Original.) 
SPRAYING AND DUSTING FOR THE RED SPIDER 
ON HOPS. 
