4 CALOSOMA SYCOPHANTA. 



Investigational work on Calosoma sycophanta — Continued. Page. 

 Investigation of the life history of Calosoma sycophanta — Continued. 

 The pupa — Continued. 



Experiments with the pupae of Calosoma sycophanta 45 



Experiments in wintering Calosoma pupie in galvanized-iron 



cages 46 



Experiments in wintering Calosoma pupse in wire-netting 



cages • 46 



Experiments in wintering Calosoma pupte in a cool cellar 46 



Length of time spent by Calosoma sycophanta in the pupal stage. . 47 



The adult or beetle 48 



Emergence of Calosoma beetles in the spring 48 



Hibernation of Calosoma sycophanta 48 



Mortality of Calosoma beetles during hibernation 50 



Experiments in wintering Calosoma beetles in galvanized-iron 



cages 51 



Experiments in wintering Calosoma beetles in wire-screen cages. . 51 



Experiments in wintering Calosoma beetles in box cages 51 



Effect of removing Calosoma beetles from hibernation early in the 



spring 52 



Feeding habits of the adults 52 



Length of feeding period of the adults 52 



Food of the adults 53 



Effect of feeding diseased gipsy moth caterpillars to Calosoma 



beetles 55 



Experiment in feeding Calosoma beetles with gipsy moth cater- 

 pillars from sprayed or poisoned foliage 55 



Experiment in feeding Calosoma beetles on beefsteak 56 



Starvation experiments with Calosoma beetles 56 



Assembling experiments 57 



Copulation 59 



. Reproduction 59 



Polygamy 61 



The effect on egg deposition of removing beetles from hibernation. 62 



Effect of cold storage on egg deposition 62 



Relation of size of beetles to reproduction 62 



Sexes of beetles reared 63 



Experiments in crossbreeding Calosoma sycophanta and C. scru- 

 tator 64 



Habits of flight 64 



Attraction of the adults to light 65 



Drowning experiments with beetles 65 



Length of life of beetles 67 



Relation of Calosoma sycophanta to native species of the same genus. . . 69 



Natural enemies of Calosoma sycophanta 70 



Colonization of Calosoma sycophanta 71 



Methods of securing data from field colonies 76 



Record of two field colonies of Calosoma beetles 77 



Colonies of Calosoma liberated in Massachusetts 78 



Colonies of Calosoma liberated in Maine 88 



Colony of Calosoma liberated in New Hampshire 89 



Economic importance of Calosoma sycophanta 89 



Index 91 



