1921 ENTOMOLOGICAL SOCIETY. 41 



The Striped Cucumber Beetle (Diabrotica vittata), The Squash Bug 

 (Anasa tristis), Asparagus Beetles (Crioceris asparagi and 0. duodecim- 

 punctata). Except in a few localities these insects were rather scarce. 



Potato Leaf Hopper (Empoasca mali). This species, although not nearly 

 so abundant as it was last year, was present in quite large numbers, and in. some 

 localities a considerable amount of "hopper-burn" developed on the potatoes. 



Experiments conducted at Vineland indicated that this year, unlike last year, 

 weather conditions played little or no part in producing potato "leaf-burn" and 

 that all or practically all the "burning" was caused by hoppers. 



Flea Beetles. The Pale-Striped Flea-Beetle (Systena taeniata) was very 

 prevalent on potatoes, tomatoes, beans, egg plants, peppers, and asters. 



Early in the season tomato plants in parts of the Niagara district were badly 

 damaged by the potato flea-beetle (Epitrix cucumeris). 



Insects Injurious to Field Crops. 



Wireworms and White Grubs. These well-known pests were as usual the 

 cause of considerable damage to various crops. 



Grasshoppers. Outbreaks of grasshoppers occurred in Huntsville and 

 Waterdown districts and in several other parts of the province. At Thedford, 

 celery grown near waste land was badly injured. Greater loss from grasshoppers 

 was prevented by copious showers in July and August. 



The Hessian Fly (MayeUola destructor). The outbreak of Hessian fly 

 is discussed elsewhere. 



The Grass Thrips (Anaphoihrips striatum). Specimens of oat heads with 

 characteristic thrip injury were received from central Ontario with the report 

 that a considerable percentage of the oat plants were similarly affected. 



Greater Wheat-stem Maggot (Meromyza americana). In Manitoulin 

 Island, according to the Agricultural Eepresentative, ten per cent, of the heads 

 of spring wheat in some fields was destroyed by this maggot. 



Chinch Bug (Blissus leucopterus) . In referring to the outbreak of chinch 

 bug in Lincoln county last year, we expressed the hope that fall rains and the 

 winter would reduce the hibernating adults to insignificant proportions. Our 

 hope was more than realized, because this season it was practically impossible 

 to find a bug in the infested district. 



Cottony Grass Scale (Eriopeltis festucae). This scale, which we believe 

 has not been reported from Ontario before, was very abundant on grass at Coniston 

 in Northern Ontario. 



Greenhouse Insects. 



The Chrysanthemum Midge (Diartlironomijia hypogaea). We regret to 

 report that the chrysanthemum midge appears to be pretty well established 

 throughout the province. It is present in greenhouses in St. Catharines, Toronto, 

 Kitchener, London, Chatham, Midland and Ottawa, and there is no doubt that 

 a survey of Ontario greenhouses would show it to be established in other places. 

 It would appear from the manner in which the midge has spread, that in a 

 comparatively short time practically all our growers of chrysanthemums will 

 bave to contend with it. 



It is worth while noting that Mr. W. W. Gammage, London, claims that 



he has practically eliminated the midge by spraying with the following mixture . 



Hammond's Thrift Juice 1 Pt. 



Nicotine or Nicofume ^-Vi ozs - 



Water 5 S als - 



