EASTERN UNITED STATES. 191 



dark brown shade. Beyond this on the fore wings the 

 ground color is pale gray, whitish near the costa, with 

 the usual row r of points. Just within the edge is a row 

 of confluent crescents, greenish edged with black within. 

 Discal G slender and somewhat abbreviated. 



The egg is conical, the base rounded ; marked by eight 

 or nine vertical ribs, which gradually increase in promi- 

 nence from the base upward and are crossed by many 

 transverse striae. 



The young larva is at first dull green, the last joint 

 with a brownish tint, but later it becomes dull white and 

 brown, with the usual black tubercles and black cervical 

 spot. After the first moult the color is greenish brown, 

 with seven rows of large branching spines. All are 

 black, but they arise from light yellow tubercles, and are 

 yellow about half-way up; on joints 12 and 13 they are 

 almost wholly yellow. Head bilobed, black. After the 

 second moult the color is at first yellow, but in twelve 

 hours changes to brown with white cross-lines. After the 

 third moult it is glossy black from joints 3 to 11, crossed 

 on the posterior half of most of the joints by three white 

 lines, with white or gray oblique stripes on the ridges on 

 which the spines stand from joints 5 to 11. 



The mature larva is from 1 to 1.2 inches long, of a 

 buff color, the cross-stripes on the posterior parts of the 

 joints black and pale buff. In front of each dorsal 

 spine is a V-shaped reddish bar with the spine within 

 the angle, and an oblique bar of the same color in front 

 of each of the laterals, from its base, directed forward 

 and downward. The second laterals stand on a straight 

 or slightly-arched bar of the same color. The spines on 

 joints 3, 4, and 5 are the largest. The dorsals are white, 



