THK CLEAR-WING DKYOCAMPA. 407 



them is the stigma of Pabricius, 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 be- 

 hind ; the hind wings have a narrow transverse purple 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. Abbot'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 ochre-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 female are purplish red, blended with ochre- 

 yellow, are almost transparent in the middle, and have the 

 same white spots and faint bands as those of the male. It 

 expands from one inch and three quarters to two inches and 

 a quarter,- or more, in some females. The distinguishing 

 name, given by Sir J. E. Smith,f to this moth, is pettueida, 

 and we may call it the pellucid or clear-wing Dryocampa. 

 I have only once seen the caterpillar, which was found on 

 an oak on the 25th of September. It was about the size 

 of that of the senatorial Dryocampa, and resembled it in 

 everything but color. Its head was rust-yellow, its body 

 pea-green, shaded on the back and sides with red, longitudi- 

 nally striped with very pale yellowish green, and armed with 

 black thorns. 



* Insects of Georgia, p. Ill, pi. 66. t Ibid., p. 115, pi. 58. 



