IX. 



DESCRIPTIONS OF SOME SPECIES OF LEPIDOPTERA, FROM 

 THE NORTHERN SHORES OF LAKE SUPERIOR. 



BY DR. THADDEUS WILLIAM HARRIS. 



PONTIA OLERACEA H. 

 PI. VII., fig. 1. 



Pontia oleracea Harris, New England Farmer, vol. VIII., p. 402 

 (1829). — Discourse before the Massachusetts Horticultural So- 

 ciety, p. 7, 21 (1832), — Catalogue of Insects of Massachusetts, 

 in Hitchcock's Report, 1st ed. p. 589 (1833).— The same, 2d 

 ed. p. 590 (1835). — Report on Insects of Massachusetts inju- 

 rious to Vegetation, p. 213 (1841). — Kirby, Fauna Boreali- 

 Americana, Part IV., p. 288 (1837). 



Pieris oleracea Boisduval, Species Gen. des Lepidopteres, tome I., 

 p. 618 (1836). 



Alls subrotundatis integerrimis albis ; anticis basi costaque nigri- 

 cantibus, subtus apicem et posticis, infra, luteis fusco-venosis. 



Alar. exp. 2 unc. 



Body black above. Antennae black, annulated with white, and 

 rufous at the tip. Wings yellowish white ; the anterior pair dusky 

 on the front edge and base ; tip, beneath, pale yellow, with dusky 

 veins. Under side of the hindwings pale yellow, with broad, 

 dusky veins, and a saffron-yellow spot on the humeral angle. 



The tip of the forewings is often marked with two or three little 

 dusky stripes, in the males. The dusky veining of the under side of 

 the hindwings is less distinct in the females than in the other sex, 



