22 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 95 



caterpillars brought home, one (collected July i) pupated on July 4. 

 three on July 8, and two on July 11. We found no butterflies on this 

 date. 



On July 15, accompanied by W. Herbert Wagner, we collected 89 

 caterpillars, all in the fourth or fifth stages, most of them in the latter. 

 As we found a considerable number of large shelters unoccupied, we 

 assume that the usual habit of these caterpillars is when fully grown to 

 leave these shelters and pupate among the dead leaves and rubbish on 

 the ground. We saw no butterflies. 



On July 20 a butterfly emerged from the pupa formed on July 4, 

 and on July 25 another emerged from a pupa formed on July 11. 

 The duration of the pupal stage in the summer is therefore 14-16 days. 



On August 5, revisiting the locality in company with Dr. and Mrs. 

 William M. Mann and Robert L. Dufifus, of New York, we found six 

 butterflies, caterpillars in all stages, and very many abandoned large 

 shelters. 



On August 19, in company with Dr. Herbert Friedmann and Hugh 

 Upham Clark, we made a rather intensive search for material, but we 

 found the insect by no means so common as previously. Only 3 

 butterflies were met with, and we could discover only 39 caterpillars, 

 mostly in the second and third stages with 4 in the first stage and about 

 half a dozen in the fourth ; there were no caterpillars in the last stage, 

 but about half a dozen recently abandoned full-sized shelters were 

 found. The numbers of adults and caterpillars of Epargyreus tityrus 

 had similarly decreased markedly, and Achalariis lyciadcs was not 

 found in any stage. 



On August 26 we were accompanied by Mrs. Frederick V. Coville, 

 Ellsworth P. Killip, and Dr. George S. Myers. We found no butter- 

 flies, and only nine caterpillars, two in the first stage, four in the last 

 stage, and three in the fourth stage. About half a dozen recently 

 abandoned full-sized shelters were discovered. A single full grown 

 and very large caterpillar of Epargyreus tityrus was found on Mei- 

 bomia paniculata. 



On September i, in company with Dr. and Mrs. William R. Maxon 

 and Miss Alice C. Atwood, we again visited the locality. No butter- 

 flies were found, and only 12 caterpillars, 2 in the second stage, 7 in the 

 third stage, and 3 in the fourth stage. A few recently abandoned 

 full-sized shelters were found. It was curious that of the 12 cater- 

 pillars found 8 were preparing to molt. One additional caterpillar, 

 in the fifth stage, was discovered with the posterior third of the body 

 blackened by bacterial rot. We had previously found a number of 

 fully grown caterpillars of Epargyreus tityrus dead in their shelters 



