14 PROCEEDINGS OF THE NATIONAL MUSEUM vol.71 



food plants to the resting places get broken from one cause or another 

 so that many of the caterpillars, unusually active though they are, 

 are unable again to find their normal food. 



As has previously been remarked by others the caterpillars are 

 singularly tenacious of life. Some in the last stage which we kept 

 for 30 days without food still were active, though their size was much 

 reduced. 



Unlike the caterpillars of many other butterflies, these apparently 

 will not pupate untill the full size is reached. 



On June 11 about 100 additional caterpillars were bought in, and 

 more on June 13 and June 20. The butterflies were now flying in 

 abundance, and we noticed that the caterpillars were divisible into 

 two size groups, a larger and a smaller, though there were many inter- 

 mediates and some dwarfs due probably to lack of sufficient food 

 and to parasitism. 



The smaller caterpillars corresponded to those which we had first 

 found which had pupated at once and emerged as male butterflies. 

 The larger caterpillars, which were much larger and stouter, we as- 

 sumed to correspond to those which instead of pupating had molted. 

 The butterflies from these all proved to be females. 



Although we have no conclusive evidence to offer we are strongl}^ 

 inclined to believe that after hibernation male caterpillars molt but 

 once, while female caterpillars molt twice; that is, that male cater- 

 pillars molt four times and female caterpillars five times. 



It is curious that the female caterpillars are much easier to raise 

 than the males. Though the male caterpillars, like the male butter- 

 flies, appear to be much more numerous than the females, most of the 

 butterflies that came through successfully were females. 



On June 27 there were still many caterpillars feeding. As only 

 one caterpillar was found suspended and there were very few on the 

 surrounding herbage we thought it probable that the caterpillars still 

 feeding were parasitized, more especially as none were very large. 



On July 17 and 18 an exhaustive search was made for the butter- 

 flies, without result. The flight seemed to be entirely over for the 

 season. 



Four webs of conspicuous size were found which entirely surrounded 

 the upper part of the Clielone stalks on which they were constructed. 

 The caterpillars in them, which were busily engaged in enlarging and 

 strengthening them, were still in the first stage, though apparently 

 about ready to enter the second. 



No last year's caterpillars were found in the field, but in our boxes 

 in the house a few were still alive, all more or less surrounded by 

 A panteles cocoons. 



In this butterfly, therefore, a few of the caterpillars of one year's 

 brood live as caterpillars beyond the entire range of the adult life of 



