THE TRIBE OF THE ANGLE-WINGS 187 



These butterflies may be seen rather frequently from 

 midsummer on, visiting various flowers and sipping the 

 juices from decaying fruits beneath the trees. At times 

 they seem to disappear in August to reappear in October, a 

 fact which has led some observers to suggest that there'is a 

 second brood. The caterpillars of this brood, however, 

 have never been observed and a much more probable ex- 

 planation has been made by Mr. W. F. Fiske who studied 

 the butterflies of New Hampshire carefully for many 

 years. He found that in the hot summer weather this 

 butterfly goes into a seclusion similar to that of its winter 

 rest — that is, it aestivates in summer and hibernates in 

 winter. "The possibility that the October J-album did 

 not represent a second brood," writes Mr. Fiske, "was 

 rendered almost a certainty by repeated observations 

 which failed to disclose a single specimen approximating in 

 freshness to average August individuals, and the question 

 of their whereabouts during the interim was unexpectedly 

 answered one warm August day by my finding several 

 snugly packed away under the shingles on an old roof. The 

 theory of the aestivation of the butterflies of this group 

 will explain a good many points hitherto obscure in the life 

 histories of the other species." 



In October these butterflies seek their winter quarters, 

 finding them in woods and groves. Apparently they com- 

 monly rest upon the bark of the trunk as well as crawl into 

 such crevices beneath loose bark as they can find. Here 

 they remain through fall, winter, and spring, except when 

 called into brief periods of activity by the unwonted 

 warmth of the winter sunshine. Then in spring they come 

 forth again to lay the eggs for the caterpillars of the new 

 generation. 



