419 



BucKELL (E. R). The Influence of Locusts on the Ranges of British 

 Columbia.— 5is/ Ann. Kept. Ent. Soc. Onlario, 1920, Toronto, 

 1921, pp. 23-29. [Received 15th June 1922.] 



The bulk of this information has been noticed elsewhere [R.A.E., 

 A, ix, 489, 603]. 



Strickland (E. H.). The Invasion of Southern Alberta by Beet 



Webworms. — 51st Ann. Rept. Ent. Soc. Ontario, 1920, Toronto, 

 1921, pp. 29-31. [Received 15th June 1922.] 



During the autumn of 1919 the second generation of Loxostege 

 sticticalis, L. (beet webworm) was unusually abundant in several 

 districts of Southern Alberta. The numbers in 1920 exceeded those 

 of previous years, but in spite of the inconvenience caused by the 

 migration of the larvae into houses, etc., it is considered that their 

 activities have been of financial benefit to the State [cf. R.A.E., A, 

 viii. 193]. 



A few individuals of the parasite Meteoriis loxostegis were bred from 

 cocoons turned up from weedy stubble in the spring of 1920. 



Hudson (H. F.). The Present Status of the Hessian Fly in Western 



Ontario. — 51st Ann. Rept. Ent. Soc. Ontario, 1920, Toronto, 

 1921, pp. 32-34. [Received 15th June 1922.] 



The financial loss due to the Hessian fly [Mayetiola destructor. Say] 

 in Western Ontario during 1920 is difficult to estimate ; in some cases 

 the entire crop was destroyed, while a few infested fields averaged 

 about ten bushels of grain"^ per acre. No wheat should be sown in 

 August, the best results being obtained with wheat sown in well- 

 manured land in October. The flies had practically all emerged by 

 21st May, and none of them was observed on the wing after 25th May. 

 A brief outline is given of the life-history. 



Parasites cannot apparently be relied upon for the control of this 

 pest. All self-sown wheat should be destroyed and infested stubble 

 ploughed under as soon after the harvest as possible. Co-operation 

 of farmers with regard to the date of sowing is essential for the best 

 results. 



Hudson (H. F.). Insects of the Season 1920.— 51st Ann. Rept. Ent. 

 Soc. Ontario, 1920, Toronto, 1921, pp. 34-35. [Received 15th 

 June 1922.] 



The more important insect pests recorded during the year included : 

 Pvrausta mihilalis (European corn-borer), which might be materially 

 re'duced by the destruction of such plants as ragweed {Artemisia 

 trifida) and barn-yard grass [Panicnm crnsgaUi) ; Agriotes mancus 

 (wheat wireworm) ; Diabrotica vittata (cucumber beetle), against 

 which one application of dust consisting of 20 lb. hydrated lime and 

 1 lb. Paris green appeared sufficient ; seed corn maggot [Hylemyia 

 ■cilicrura], recorded for the first time as causing injury in Western 

 Ontario ; cabbage worm [Pieris rapae], unusually abundant ; and 

 Depressaria heracleana (parsnip webworm), also very abundant. 



