EASTERN UNITED STATES. 115 



Farther south the winter form, or the one that comes 

 in early spring from chrysalides that have hibernated, 

 tends to pure white on the upper surface. One male 

 in the writer's cabinet has an obscure patch on the apex 

 of the fore wings, and the costal mark of the hind wings 

 about as much obscured, no trace of the spot in the me- 

 dian interspace except what shows through from below. 

 Another male has scarcely a trace of the apical patch, or 

 the costal mark, with perhaps half a dozen scales in the 

 median interspace. On the under side these specimens 

 differ a little from the usual form, both being more suf- 

 fused with black on the hind wings, the fore wings with 

 scarcely any or no yellow at the apex, and only a few 

 scales in place of the usual dots. 



Var. Manni, Mayer.— This is a pale yellow form, 

 having all the usual markings, but the upper surface pale 

 yellow of a clear type and not ochraceous-tinted. Under 

 side like the others. Found in both sexes. 

 Georgia ; Chicago, Illinois. 



The larva of this species feeds on cabbage, turnips, 

 and some other plants. It is not a native of this country, 

 but was introduced from Europe about 1863, since which 

 time it has spread over the most of the United States. 

 It is usually known as the European Cabbage Butter- 

 fly. 



The eggs are deposited irregularly over the surface of 

 the leaf of the food-plant, mostly on the under side. 

 They are somewhat pear-shaped, flattened at the base, 

 and the apex truncate. In color they are yellowish, 

 marked with twelve longitudinal ribs, crossed by very 

 fine lines between. 



The young larva is pale yellow. It first eats the shell 



