August with arsenate of lead.

[Illustration: FIG. 102.--The Gipsy Moth. (After F.W. Rane Mass. State
Forester.)]

[Illustration: FIG. 103.--The Brown-tail Moth. (After F.W. Rane, Mass.
State Forester.)]

[Illustration: FIG. 104.--Larva of the Leopard Moth.]


THE FALL WEBWORM

The caterpillars of this insect congregate in colonies and surround
themselves with a web which often reaches the size of a foot or more in
diameter. These webs are common on trees in July and August. Cutting off
the webs or burning them on the twigs is the most practical remedy.

[Illustration: FIG. 105.--Branch Showing Work of the Leopard Moth Larva.]


THE LEOPARD MOTH

Life history: This insect does its serious damage in the grub form. The
grubs which are whitish in color with brown heads, and which vary in
size from 3/8 of an inch to 3 inches in length (Fig. 104), may be
found boring in the wood of the branches and trunk of the tree all
winter. Fig. 105. The leopard moth requires two years to complete
its round of life. The mature moths are marked with dark spots
resembling a leopard's skin, hence the name. Fig. 106. It is one of