EASTERN UNITED STATES. 291 



more, but there is little change from the former period. 

 The fourth or last moult occurs three or four days after- 

 wards, and in five or six days from this the larva is ready 

 to pupate. 



The mature larva is .4 of an inch long in the spring 

 and fall broods, and from .5 to .55 in the summer brood ; 

 the shape as in the preceding stages. The color is 

 variable. In spring, usually the ridge is whitish, often 

 stained red, or it is brown, light or dark ; the upper 

 part of the side olive-green, with a darker green or 

 sometimes a dull red patch along the posterior edge of 

 each joint. Below this area it is pale green, and along 

 the base more or less brown. Joints 11 to 13 are 

 mottled in shades of green, often with brown, and joint 

 2 is either green or brown ; if the latter, then with a 

 brown patch in the depression. Color in summer, some- 

 times white or delicate green, joint 2 being brown ; or the 

 ridge is light green and the sides dark, often with brown 

 patches over all ; or light green, with a dorsal macular 

 deep green band, and a similar one along the base ; or 

 the whole surface may be wine-red or even chocolate- 

 brown. Color in fall, green, with more or less brown 

 in irregular patches. Head dark brown. 



The chrysalis is dark brown or yellow-brown, varying, 

 the wing-cases dark, and sometimes green-tinted. On 

 the abdomen are two subdorsal rows of blackish dots, 

 sometimes a dark dorsal line. 



In addition to the food-plants already given, Apios 

 tuberosa, Eryihrina herbacea, Spiraea salicifolia, Ceano- 

 thus Americanus, Cornus, and Ilex may be specified. 



