220 



JOURNAL OF ECONOMIC ENTOMOLOGY 



[Vol. 3 



had been destroyed ranged from 60 to 100 per cent, the average being- 

 78 per cent by the beetle larvae and 4.5 per cent by all other enemies. 

 In these areas the trees had been stripped early in the season and 

 the beetle larvas had become full grown and gone into the ground to 

 pupate before the examination was made. 



In the remaining 24 areas examined frigiduni larvae ranging from 

 newly hatched to nearly full fed w^ere found. In one case 21 larvae 

 were discovered feeding on pupre. At this time the number of pupae 

 that had been killed by the larvae of frigidwni varied from 11.7 per 

 cent to 80.2 per cent, the average being 54 per cent of the total 

 number of pupaS. Where the lower percentages were found a con- 

 siderable number of small frigidum larvse were present. The follow- 

 ing table has been compiled from the data secured : 



TABLE SHOWING THE NUMBER OF HETEROCAMPA PUP^ DESTROYED BY 

 LARV^ OF CALOSOMA FRIGIDUM 



1 Also one larva of Heterocampn. 



2 Also two larvae of Heterocampn. 



