1913 



ENTOMOLOGICAL SOCIETY. 



71 



Comments. In some orchards certain varieties may be exempt from attack, 

 whereas in others these same varieties may be badly infested. In an orchard near 

 Bowmanville none of the Ben Davis were punctured; on the other hand, in a place 

 near Port Hope and another near Stirling this variety was badly attacked. 



In affected orchards seedling trees are practically always badly infested. 



Distribution. Chiefly through the courtesy of Mr. Caesar I have records of 

 the occurrence of this pest in the following counties of Ontario: — Prince Edward, 

 Hastings, Frontenac, Northumberland, Durham, Ontario, Wentworth, Lincoln, 

 Welland, Norfolk, and Carlton. 



I should be very grateful if any member of this Society would add to this list. 



MJR. Gibson: Some years ago I carried on some breeding experiments. The 

 depth to which the larvse burrow in confinement is of much interest. In one jar 

 I had put about eight inches of earth, and some of the larvae burrowed to the 

 bottom of the jar, where they pupated. 



Mr. Ross: I had twelve inches of earth and ninety per cent, emerged. 



Dr. Hewitt : What was the usual depth ? 



Mr. Eoss: Possibly about three-quarters of an inch. Most of them. 



