— 34 — 
necessary to increase the strength of the mixture. If this is 
found necessary it will probably be better to treat as for the 
Scurvy Bark-Louse. 
The soft maple is also attacked by the Fruit-tree Leaf- 
roller, bdat-headed Borer, Fall Webworm and Plant Lice. 
THE ASH GALL-LOUSE. [Pent /)Jiio‘its fi’tiA'uufoW Thos.) 
Greenish plant lice curling the leaves of white ash. The 
lice usually accumulate on the leaves at the end of a limb. 
The leaves curl and become so swollen and loaded with lice 
that the limb will often be bent down with the weight. 
' Remedy— As soon as the leaves at the end of the limb 
begin to curl, cut the limb off far enough back to include all 
.the infested leaves and burn it. 
THE COTTONWOOD BORER. {Prionoxisiii^ robiin'cc Peck.) 
Fig. : 50 .--Cotton\vood Borer {Priono.vistiLH J'ohi/biitr): Showing male 
and female moth anil the larva. The female moth is the larger. 
