406 
LEPIDOPTER A. 
Fig. 199. 
have their regular times for eating and for rest, and when 
they have finished their meals, they cluster closely together 
along the twigs and branches. If disturbed, they raise the 
fore part of their bodies, and shake their heads to signify 
their displeasure. When fully grown they measure about 
two inches in length. Commonly in the early part of Sep- 
tember, they crawl down the trees and go into the ground, 
to the depth of four or five inches, where they are changed 
to chrysalids (Fig- 199). These re- 
semble the chrysalids of the imperial 
Dryocampa, but are much smaller, and 
like them they remain in the ground 
throughout the winter, and work their way up to the sur- 
face in the following summer. These chrysalids may often 
be seen sticking half-way out of the ground under oak-trees 
in the latter part of June and the beginning of July, at 
which time the 
Fig. 200. . , , 
moths burst them 
open and make 
their escape. Dry- 
ocampa scnatoria 
(Fig. 230), the 
senatorial Dryo- 
campa, which is 
the name of this 
kind of moth, is of an ochre-yellow color ; the wings are „ 
faintly tinged with purplish red, especially on the front and 
hind margins, and are crossed by a narrow purple-brown 
band behind the middle ; the fore wings are sprinkled with 
blackish dots, and have a small round white spot near the 
middle. The male is much smaller than the female, its 
wings are thinner, and more tinged with dull purple-red. 
It expands about an incli and three quarters ; the female, 
two inches and a half, or more. 
Three more kinds of Dryocampa are found in Massachu- 
setts, but they are all rare in this State. The largest of 
