CONTENTS. 



Page. 



Introduction 7 



Importations of Calosoma beetles from Europe and Japan 8 



Methods of packing predaceous beetles for shipment 9 



European distribution of Calosoma sycophanta and hosts attacked 13 



Plan of work at the laboratory 13 



Investigational work on Calosoma sycophanta 14 



Equipment used for rearing predaceous beetles 15 



Out-door insectary for rearing Calosoma beetles 18 



Methods of rearing predaceous beetles 20 



Investigation of the life history of Calosoma sycophanta 22 



The egg.. 23 



Notes on hatching 25 



Effect of cold on eggs 26 



The larva 26 



First-stage larva 26 



Second-stage larva 26 



Third-stage larva 27 



The process of molting . . . * ' 27 



Length of time in larval stages 27 



Time of appearance of the larva 29 



Habits of the larva 29 



Distance traveled by the larva 30 



Feeding habits of the larva 32 



Food of the larva 34 



Experiments in feeding larvae 35 



Amount of food required 35 



Experiments in feeding Calosoma larvae with diseased gipsy 



moth caterpillars 36 



Results of feeding to Calosoma larvae caterpillars from sprayed 



or poisoned areas 37 



Experiments in feeding gipsy moth pupae to Calosoma larvae ... 38 



Experiment in feeding earthworms to larvae of Calosoma 39 



Starvation experiment applied to larvae of Calosoma sycophanta. . . 40 

 Experiment to determine whether Calosoma larvae will hibernate 



during the winter 41 



Placing Calosoma larvae in cold storage to determine ability to 



withstand cold 41 



Methods used in rearing Calosoma larvae 41 



The distance Calosoma larvae penetrate the ground to pupate. ... 44 



The pupa 45 



The pupal chamber 45 



Description of pupa 45 



3 



