
1 
PLATE XXNIIJ.—EXPERIMENTS WITH Dcagwoop Sctrvy BARK LOUSE: ee 
ENLARGED VIEW OF 4; 2, ENLARGED VIEW OF 5 SHOWING INORE/ SE OF 
Younc ScaALes; 4. SPRAYED; 5, CHECK; 6, CONDITION oF SCALE F **VIOUS 
TO TREATMENT. 
