EASTERN UNITED STATES. 231 



fcer of any other joint, body tapering slightly from joint 

 2 back. Each segment from 3 to 12 is creased, making 

 six ridges ; on each of the first and fifth is a minute tu- 

 bercle with a rather long hair bent forward, making two 

 dorsal rows, with a similar row on the sides, and more 

 lower down. Color of body whitish yellow, changing 

 to pale green. Head slightly cordate, on each vertex a 

 slight protuberance with a long curved hair, and other 

 hairs over the surface. Color yellow. 



After the first moult there is but little change, the 

 body ending in two long, slender, blunt-tipped tails ; 

 color green, tubercles white. After the second moult 

 the color is light green, the subdorsal tubercles more 

 yellow, horns long, with red tips. After the third moult 

 the color is the same. The larva hibernates in this stage, 

 moulting twice more after reviving from its lethargy in 

 the spring. After the fourth moult the color is yellow- 

 green, with dark green dorsal and subdorsal stripes, and 

 one below these, all narrow. 



The mature larva is from 1.2 to 1.4 inches long, the 

 dorsum much arched, and sloping about equally each 

 way from the middle, ending in two small, short, slender 

 tails. Each joint is creased, the first ridge broadest and 

 bearing many fine whitish tubercles, mostly arranged in 

 rows. Color yellow-green striped with dark green and 

 yellow. Head yellow-green, the vertices bearing stout, 

 tapering horns, red-tipped. 



The chrysalis is .6 of an inch long, green, the ventral 

 sides of abdomen whitish ; top of head-cases and edge 

 of wing-cases cream color, the surface smooth and glossy. 



The butterfly emerges from the chrysalis in about 

 fourteen days, appearing on the wing in July, specimens 



