136 LASIOCAMPIDS. 
than these caterpillars, and it pays to study it carefully, as 
by so doing a number of excellent remedies will suggest 
themselves and can be used to assist us in a war against 
them. 
THE ORCHARD TENT-CATERPILLAR. 
(Clisiocampa americana Harr.). 
The adult insects of this species measure with wings ex- 
panded a little more than one and a half inches; they are 
reddish-brown, and the fore-wings are tinged with gray on 
Fig. 136 —Clisiocampa americana WHarr.; a, b, mature 
caterpillars; c,egg mass; d,cocoon. After Riley. 
the base and middle, and are crossed by two oblique lighter 
stripes. As they fly only at night they are not often seen; in 
places, however, where powerful electric lights are used 
many are attracted and thus can be collected in large num- 
