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THE CANADIAN ENTOMOLOGIST 



to 7 by 5 mm. During oviposition and accompanying the harden- 

 ing of the derm, the latter becomes perforated with minute open- 

 ings known as derm pores. 



Experiments in host plant transfers. — A number of experi- 

 ments were undertaken in view of definitely determining whether 

 Lecaniiim corni could be tr-ansferred from one host plant to an- 

 other, and the following table represents the results obtained. 



TABLE I.— TRANSFER EXPERIMENTS WITH LECANIUM CORNI. 



It will be observed that in several instances unsuccessful at- 

 tempts were made to transfer Lecanium corni, but this was due 

 to either parasitism or dislodgeir.ent of the ferrales. 



