April, '10] BURGESS: CALOSOMA 219 



found and several larvae were seen on the ground feeding on the eater- 

 pillars. A square yard of ground was carefully examined by Mr. 

 Fiske and the writer, and 12 frigidum larvsB were found just beneath 

 leaves and litter. They were busily engaged in feeding on the cater- 

 pillars that had crawled under the forest cover for the purpose of 

 pupation. 



On the following day a badly infested area was examined near 

 White Horse Mountain, near North Conway, and although it was not 

 possible, owing to lack of time, to make a thorough survey of the 

 defoliated area, very little search was required to discover many of 

 the beetles. This colony was located on the side of the mountain and 

 the caterpillars were not as far advanced as those seen at Tamworth. 

 At one place on the edge of the badly infested area upwards of 100 

 beetles were found busily engaged in climbing the trees and feeding 

 on the caterpillars. Few Heterocampa larvte were found under the 

 leaves and no beetle larva were seen. 



Mr. C. 0. Bailey, Secretary to the Massachusetts State Forester, 

 informed me that while driving at Effingham, New Hampshire, August 

 1, 1909, he observed large areas of woodland that had been stripped 

 by Heterocampa. At one place the trees had been completely de- 

 foliated and countless numbers of the caterpillars were seen crawling 

 across the road. They were being attacked by Calosoma frigidum, 

 which species was present in large numbers. 



As few parasitic insects were observed it was thought desirable 

 to make another trip later in the season in order to check up the 

 data secured, and accordingly on August 21 Mr. Fiske and Mr. 

 Harry S. Smith went to North Conway for that purpose. After 

 finishing the investigations made in the localities visited on the 

 previous trip Mr. Fiske returned, and Mr. Smith spent several days 

 examining other defoliated areas on Mount Kearsarge and in the 

 surrounding territory. 



A summary^ of the notes made by Mr. Smith, so far as they relate 

 to Calosoma frigidum, has been very kindly placed at my disposal, 

 while those bearing on certain parasitic forms will be used by him 

 after more information has been secured next season. 



At the time of this visit Heterocampa w^ere nearly all in the pupal 

 stage beneath the leaves and rubbish on the ground, and as frigidum 

 larvffi were present in considerable quantities, and actively engaged 

 in feeding on the pupce counts were made to determine the relative 

 percentage of pupae destroyed. About a square yard of ground was 

 examined in each locality, 29 sets of data being secured. In five of 

 these no frigidum larvse were found but the number of pupae that 



