1921 ENTOMOLOGICAL SOCIETY. 39 



The Rose Scale (Aulacmpis rosae). This scale insect was unusually com- 

 mon on raspberries in some parts. of the Niagara district. 



The Thee Cricket (Oecanthus ingricornis). Quite a few complaints were 

 received last spring regarding injury to raspberry canes by this species. 



Vegetable Insects. 



Cutworms. According to reports received from different parts of the 

 province, cutworms were unusually destructive in May and June to tomatoes, 

 corn and cabbage. 



The Imported Cabbage Worm (Pieris rapae). This well-known pest was 

 not nearly so abundant as last year, although as usual it was present in fairly 

 large numbers toward the end of the season. 



The Cabbage Maggot (Pliorbia brassicae). This destructive insect was 

 very common and very injurious in many localities to early cabbage, cauliflower, 

 early turnips and radishes. In New Ontario it seems to be even a greater pest 

 than in old Ontario, and sometimes does serious damage there to held turnips. 



We are pleased to report that the corrosive sublimate remedy is coming into 

 quite general use. In all cases where the treatment was made according to the 

 usual directions, excellent results were secured this year. 



The Oxiox Maggot (Hylemyia antiqua). Here and there throughout the 

 province this maggot caused considerable loss. 



The Onion Thrip (TJirips iabaci). Weather conditions were unfavorable 

 for the development of this insect, and as a result no injury was done by it to 

 the onion crop. 



The Colorado Potato Beetle (Leptinotarsa decemlineata). Was remark- 

 ably scarce in the Niagara and some other districts. 



Potato Aphids. In July some potato patches in the vicinity of Grimsby 

 became very heavily infested with the spinach aphis — Myzus persicae. This pest 

 was readily brought under control by spraying with Black-leaf-40 in combination 

 with Bordeaux mixture. 



The Destructive Pea Aphis (Macrosiphum pisi). This plant louse was 

 again very injurious to canning factory peas. In Norfolk county it was estimated 

 that it cut down the yield of peas to about one-third of a crop. For the first 

 time in the experience of the Dominion Canners at Simeoe, early peas were 

 severely attacked by the aphis. 



Boring Caterpillars. Many specimens of the common stalk-borer 

 (Papaipema nit eh) and of the burdock borer (P. cataphracta) were submitted for 

 identification by growers who mistook these caterpillars for the European Corn 

 Borer. The common stalk-borer was found in corn and potatoes, and the other 

 species in corn and cultivated asters. 



Stem-Boring Wireworms. In a tomato field near Vineland, about 65% 

 of the plants were infested by two species of stem-boring wireworms, (Agriotes 

 * mancus and M-elanotus sp.). In some instances the larva? bored five to five and 

 one-half inches up the stem. About 20% of the tomatoes were so seriously injured 

 that they were pulled out. The infested plants left in the field managed to 

 survive, but made very little growth. 



Parsnip Web Worm (Depressaria heracliana). The greenish-yellow cater- 

 pillars of this species were abundant as usual on parsnips grown for seed. 



European Corn Borer (Pyrausta nubilalvs). The outbreak an 'Southern 

 Ontario of this undesirable alien is discussed elsewhere. 



