_Pyrophila pyramidoides_ (Guen.)
This caterpillar, Fig. 21, is generally found on grapevines early in
June, but also feeds on apple, plum, raspberry, maple, poplar, etc. It
is about an inch and a half in length, with the body tapering toward
the head; of a whitish green color, darker on the sides; with a
longitudinal white stripe on the back, broader on the last segments.
Low down on each side is a bright yellow stripe, between this and the
one on the back is another less distinct, and the under surface of the
body is pale green.
[Illustration: FIG. 21.]
The caterpillar is fully grown about the middle or last of June, when
it descends to the ground, draws together some of the fallen leaves,
and makes a cocoon, in which it soon changes to a mahogany brown pupa.
[Illustration: FIG. 22.]
In the latter part of July the perfect moth, Fig. 22, emerges,
measuring, when its wings are expanded, about one and three-fourths
inches; the fore wings are dark brown shaded with lighter, with dots
and wavy lines of dull white. The hind wings are reddish, or of a
bright copper color, shading to brown on the outer angle of the front
edge of the wing, and paler toward the hinder and inner angle.
The under surface of the wings is lighter than the upper, and the body
is dark brown, with its posterior portion banded with lines of a paler
hue.
This pest may be destroyed by hand picking, or by jarring the trees or
vines on which they are feeding, when they will fall to the ground and
may be crushed or burned.