THE CANADIAN ENTOMOLOGIST. 121 



First moult May i8th. 



Second Stage.— Length at rest, 4 mm ; extended, 5 mm. Head and 

 mouth-parts yellowish-green. Ocelli glossy black. Body light green, a 

 faint whitish subdorsal line. Legs concolorous, claws black. Tubercles 

 not contrasting. Set?e gray. 



Second moult May 18th. 



Third Stage. — Length, 7 mm. Head yellowish-green. Ocelli black. 

 Body and legs light green. A gray dorsal line interrupted in the inter- 

 sections. Subdorsal line more conspicuous than in stage 2, broken into 

 spots on each segment. Tubercles light gray. Set^e on i and ii blackish, 

 the lower ones gray. 



Third moult May 31st. 



Fourth Stage. — Length, 13 mm. Head pale green, 2 mm. wide. 

 Ocelli black. Body green dorsally, lighter green below subdorsal line. 

 Dorsal, subdorsal and stigmatal line yellowish-green. Legs pale green. 

 Tubercles oval, prominent, pale yellow, with brown centre. Setse dark 

 gray. 



Fourth moult June 8th. 



Fifth Stage. — Length, 23 mm. Head 3 mm. wide, bluish-green. 

 Mouth-parts brown. Ocelli black. Body yellowish green above, bluish- 

 green below stigmatal line. Legs pale green, claws a shade lighter. 

 Dorsal and subdorsal lines pale yellow, the former interrupted in the 

 intersections and on the somites. The subdorsal line narrow and broken 

 into irregular spots, the stigmatal line prominent, brighter yellow and 

 continuous from second to anal segment. Tubercles prominent, pale 

 yellow, with brown centre, iv of equal distance from and in line with 

 spiracle except on segment 6, where it is slightly above, and in 7, where it 

 is further removed and lower. 



Larvae matured June 17th. Length, 38-40 mm. 



Pupa. — Light brown, darker over the eyes and on anal segment. 

 Wing-cases ornamented with dentate striations. The segmental rings 

 have numerous small round dents anteriorly, smooth posteriorly. 

 Cremaster armed with four short spines. Two crescent-shaped dark 

 brown raised ridges in subdorsal area on anal segment. 



Pupation occurs in cells from 3-4 inches below surface. 



Food plant. — Carya alba, Nutt., Shellbark Hickory. 



I was fortunate in finding 12 females of this species during two 

 afternoons in a beautiful hard timber woods near New Brighton, Pa., last 

 April. They emerge about noon, and may be found on the trunk of the 



