HOW TO KNOW THE BUTTERFLIES 



Canada, the Northern States, and in the Alleghany 

 Mountains southward to Georgia. It is double- 

 brooded in the North and triple-brooded in the 

 South, and winters as a chrysalis. 



From cocoon forth a butterfly 



As lady from her door 

 Emerged — a summer afternoon — ■ 

 Repairing everywhere, 

 Without design, that I could trace, 

 Except to stray abroad 

 On miscellaneous enterprise 

 The clovers understood. 



Emily Dickinson. 



THE BLUES 



The Blues may be distinguished from the other gossa- 

 mer-winged butterflies by the slender form of the body and 

 the blue color of the upper surface of the wings. This is a 

 rather difficult group to study owing to the fact that in several 

 cases a single species exists under two or more distinct forms, 

 and also that the two sexes of the same species may differ 

 greatly. It often happens that two individuals of the same 

 sex but of different species resemble each other more closely in 

 the coloring of the upper surface than do the two sexes of 

 either of the species. In each of our Eastern species the upper 

 surface of the wings of the female is much darker than that of 

 the male. 



Fifty North American species have been described ; but 

 most of these occur only in the far West. Four species occur 

 in the East ; these can be separated as follows : 



244 



