138 Life and Immortahty. 
appears, and is characterized by dimorphism in the female, 
some of that sex being blue, others black. This form, which 
may be called the winter form, deposits its eggs in the clus- 
ters of flower-buds of the Dogwood, the young larve obtain- 
ing their first food by boring into the buds, but later on 
eating their way into the ovaries. The flies that come from 
these larvze late in May are Pseudargiolus, which, as stated 
before, lays its eggs on Cimicifuga racemosa, most of the 
i 
VIOLACEA BUTTERFLY. 
Larva, Protected by Ants, Feeding on Flower-buds of Dogwood. 
resulting butterflies over-wintering to produce Violacea. A 
small percentage of the May chrysalids give butterflies as 
late as September, which are smaller than the parent-form, 
and also differ therefrom in the more decided character of 
the marginal crescent discal spots on the under side of the 
wings. There does not seem to be any regular second sum- 
mer brood, that is, there are but two regular annual broods, 
the Violacea of March and the Pseudargiolus of May, the 
