EASTERN UNITED STATES. 209 



the midrib, and when at rest is to be found on this 

 stripped portion. 



After the first moult the color is blackish brown, with 

 a light brown patch on joint 8, covering the dorsum and 

 part of the sides. On all the joints back of the second 

 there is a broad ridge, in most cases followed by two 

 narrow ones; the broad one on joint 3 elevated and 

 bearing two tawny conical processes, crowned by a clus- 

 ter of little fleshy knobs. Besides these there are other 

 lower processes along the back. After the second moult 

 the dorsal patch becomes pale buff, and extends partly 

 over joints 7 and 9. 



Five days after this moult each larva begins to make 

 its hibernaculum, or case in which to hibernate, and three 

 days later they close themselves in these cases, where they 

 remain till the following spring. After they emerge from 

 the hibernaculi they feed about two days and moult the 

 third time, when they are red-brown speckled and mottled 

 with black, with the processes ferruginous. Joints 2 to 4 

 are yellowish inclining to buff. After the fourth moult 

 the color remains about the same. 



The mature larva is 1.2 inches long; the red color 

 two days after the fourth moult begins to change to 

 green, olive, and partly a light and deep green ; the 

 dorsal patch to sordid buff, dull red buff, or whitish ; the 

 anterior segments to gray or whitish. The head changes 

 from red to blue, and becomes dark drab. 



The chrysalis is .9 of an inch long, subcylindrical, 

 the abdomen somewhat compressed laterally and termi- 

 nating rather abruptly; the general shape much like 

 that of L. Disippus. The color of the wing-cases and 

 anterior parts silvery gray, the former tinged with brown 



18* 



