LEPIDOPTERA OF LAKE SUPERIOR. 387 



and is sometimes entirely wanting. Specimens of the females have 

 been seen, though rarely, with one or two dusky spots on the upper 

 side of the forewings, towards the outer margin. 



The eggs of this insect are pyriform, longitudinally ribbed, and 

 of a yellowish color. The larva is pale green, very minutely 

 sprinkled with darker dots, and with a darker dorsal hne. It grows 

 to the length of one inch and a quarter. Its natural food is un- 

 known, but it is found abundantly on the leaves of the mustard, 

 turnip, radish, cabbage, and other cultivated oleraceous plants, to 

 which it is often very injurious. The j^wpa is pale green or white, 

 regularly and finely spotted with black. There is a conical projec- 

 tion on the front, and a securiform one on the thorax ; and the sides 

 of the body are angular and produced in the middle. Length of the 

 pupa eight-tenths of an inch. The pupa state lasts about eleven 

 days in the summer, and continues through the winter ; there being 

 two broods of the larva in the course of one season. 



This species rarely extends further south than the latitude of New 

 Hampshire. It has not been figured before. Mr. Kirby's Pontia 

 casta may, perhaps, be only a variety of it. 



Deilephila Cham^nerii II. 

 PL VII., fig. 2. 



Spldnx Epilohii Harris, Cat. Ins. Mass. in Hitchcock's Report, 1st 

 ed., p. 590 (1833).— The same, 2d ed., p. 591 (1835). 



Deilepldla Ghamcenerii Harris, Catalogue of North Amer. Sphin- 

 ges. Amer. Journ. Science, vol. 36., p. 305 (1839). 



Olivaceo-brunnea ; capite thoraceque linea laterali alba ; alls prim- 

 oribus vitta duplici intermedia, apice attenuata, parte exteriori denta- 

 ta pallide ochracea, parte interiori flexuosa fusca ; secundariis nigro- 

 fuscis, fascia lata macula rubra includente rosea, intus, ciliisque 

 albis ; abdomine punctis sex dorsalibus albis, lateribus fasciis duabus 

 nigris et albis prope basin, duabusque albis posterioribus abbreviatis. 



Alar. exp. 2f — 3 unc. 



Olive-brown, with a white lateral line, extending from the front 



