THE TRIBE OF THE ANGLE-WINGS 185 



feed upon the adjacent leaves and a little later become full 

 grown as caterpillars. Each now wanders away and find- 

 ing such shelter as it is able to, spins a button of silk and 

 becomes a chrysalis. It remains in this condition but a 

 short time before it emerges again as the beautiful but- 

 terfly. 



This species is commonly reputed to have three broods a 

 year, hibernating both as a butterfly and as a chrysalis. 

 It has been suggested, however, by Mr. W. F. Fiske, one of 

 our most painstaking entomologists who has studied the 

 butterflies of New Hampshire for many years, that it is 

 more probably double-brooded with a period of aestiva- 

 tion during the later weeks of summer. This seems a very 

 probable condition and it is to be hoped that some observer 

 will make such a careful study of this species as to settle 

 the point definitely. 



In the case of many butterflies the distribution of the 

 species coincides with the distribution of the food plant. 

 This American Tortoise-shell, however, is perhaps the 

 exception that may prove the rule, for its southward limit 

 is far north of the southern range of the stinging nettle. 

 Evidently, it is a species which has developed in adjust- 

 ment to the cool climate of northern regions or high alti- 

 tude, and it does not easily adapt itseK to a warmer 

 territory. 



The White-J Butterfly or Compton Tortoise 



Eugonia J-alhum 



During bright days in March and April one is hkely to 

 find two kinds of butterflies on the wing in open glades of 



