HOW TO KNOW THE BUTTERFLIES 



lives upon several species of willow ; it trims 

 down the leaf, methodically beginning at the outer 

 edge and eating: toward the center. The winter 

 is passed in the egg state. 



But she — God love her ! — feared to brush 

 The dust from off its wings. 



Wordsworth. 



The Banded Hair-streak 



Thecla calanus (Thec'la cal'a-nus) 



Plate XXXIV, Fig. i, 2, 3 



The upper surface of the wings is dark brown or blackish 

 brown. There is sometimes an orange spot in cell Cu, of the 

 hind wings, and a more or less distinct bluish white line ex- 

 tending from vein Cu ] to the anal angle of the same wings. 

 The under surface is blackish slate brown, nearly as dark as 

 the upper surface; there is a dark bar edged with bluish white 

 at the end of cell R + M of both wings, and just outside of the 

 middle a row of small, dark, blue-edged spots, which form 

 an almost continuous line; and a submarginal series of black 

 crescents, edged within with white. Expanse of wings one 

 and one-fifth inches. 



The larva feeds on oak and hickory. Excepting the 

 southern portions of the Gulf States, the species is found 

 throughout our territory east of the Rocky Mountains and in 

 the southern part of Canada. It is our most common species 

 of Thecla. 



Caterpillar. — Slug-shaped; length one-half inch ; bright 

 grass green in color marked with lighter and darker lines 



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