Engel : Lepidoptera of Western Pennsylvania. 39 



722. Ceratomia undulosa Walker. 



May 7-22; July 2i-September 10. Common. Foodplant : ash. 



728. Marumba modesta Harris. 



New Brighton, July 4-9 (Merrick); Pittsburgh and Wilmerding 

 (Krautwurm, Zahrobsky, and Foerster). Foodplant : poplar. 



729. Smerinthus jamaicensis Drury. 



May 23-June 16 ; July 20-August 25. Common. The larvae feed 

 on willow. 



731. Paonias excaecata Smith & Abbot. 



June 15-July 19. Common. Foodplants : maple, wild cherry. 



732. Paonias myops Smith & Abbot. 



May 30-July ; July 27-August 29. Common. Foodplant: wild 

 cherry. 

 734. Cressonia juglandis Smith & Abbot. 



June i6-July 30. Common. Foodplants: hickory, walnut. 



Family SATURNIID^. 



739. Samia cecropia Linnseus. 



May i8-June 25. Common. The foodplants are all arboreal Rosa- 

 cese, Betulaceae, Salicacege, Sambucus, and other plants. I have found 

 it very commonly on Salix and Sambucus. 



744. Callosamia promethea Drury. 



June 14-July 20. Common. Larva in small colonies while young, 

 and later scattered on spice-bush, wild cherry, and tulip-tree. 



745. Callosamia angulifera Walker. 



May 26-July 12. Rare. Larva on tulip-tree (^Liriodetidron tulipi- 



fera). The Messrs. Krautwurm have reared the larvae and collected 



the cocoons from the branches of the tulip-tree. The cocoons are 



often attached to the branches, but are not suspended like the cocoon 



oi promethea. 



747. Tropaea luna Linnseus. 



May i-June 2 ; July 23-September 2. Common. The larva 

 occurs on hickory and black and white walnut, and persimmon. 



748. Telea polyphemus Cramer. 



June i-August 13. Common. The larvce of this very variable 

 species occur on a great variety of plants, but seem to prefer hawthorn, 

 willow, chestnut, maple, and oak. 

 753. Automeris io Fabricius. 



May 2-July 7 ; September 6-27. Common. The latter dates are 



