aiS INSECTS INJURIOUS TO VEGETATION. 



ter, and work their way up to the surface 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 moths burst 

 them open and make their escape. Dryocampa senatoria, the 

 senatorial Dryocampa, 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 inch and three 

 quarters ; the female two inches and a half, or more. 



Three more kinds of Dryocampa are found in Massachusetts, 

 but they are all rare in this State. The largest of them is the 

 stigma of Fabricius, or spotted-wing Dryocampa. It is of a 

 reddish ochre or deep tawny yellow color ; the fore wings are 

 tinged with purplish red behind, are thickly sprinkled with 

 blackish dots, have a small round white spot near the middle, 

 and a narrow oblique purple-red band behind ; the hind wings 

 have a narrow transverse purple-red band, behind which the 

 border is sprinkled with a few black dots. It expands from 

 one inch and three quarters to two inches and three quarters. 

 The caterpillar, which I have not seen, is figured in Mr. Ab- 

 bot's work,* where it is colored yellow, with black thorns on 

 its back. It is said to live on the oak, in swarms, while young, 

 but these disperse as the insects grow large. 



The following resembles the senatorial Dryocampa; but is 

 rather smaller, and is a more delicate moth. The color of its 

 body is ocre-yellow ; the fore wings of the male are purple- 

 brown, with a large colorless transparent space on the middle, 

 near which is a small round white spot, and towards the hinder 

 margin a narrow oblique very faint dusky stripe ; the hind 

 wings are purple-brown, almost transparent in the middle, and 

 with a very faint transverse dusky stripe ; the wings of the 



* "Insects of Georgia," p. Ill, pi. 56. 



