1916 



ENTOMOLOGICAL SOCIETY. 



13 



The ]\'ed-iieaded Flea Beetle (Systena frontalis). In the middle of August 

 this common black flea-beetle was seen at Ottawa to be attacking potatoes, and in 

 flower gardens asters and chrysanthemums were injured. It was also found on 

 carrot. It may be easily recognized by the conspicuous red patch on the top of the 

 head; in length it is about three-sixteenths of an inch. Potato vines which are 

 properly sprayed to protect them from the Colorado Potato Beetle would, of course, 

 also be protected from the ravages of the Red-headed Flea Beetle. 



Pea Aphis {Macrosifhum pisi). In eastern Ontario a rather serious out- 

 break of the pea aphis occurred, and from a few places reports of injury by the 

 Carrot Eust Fly {Psila roses) were received. 



Illustrating larva of Dock Sawfly, Ametastegia glahrata {Taxonus 

 nigrisoma) and its habit of boring into apples in autumn in 

 which to hibernate. (Original.) 



Attacking Fruit Trees. 



Aphides. These insects were present in large nnmbers during the season, 

 many enquiries being received particularly with regard to the species occurring on 

 plum and apple. 



The Oyster-shell Scale (Lepidosaphes uhiii L.) was frequently reported, 

 but few instances of noticeable damage by the Codling Moth (Ci/dia poinonella), 

 came to my notice. 



The Dock Sawfly (Ametastegia glahrata Fallen). During 1915 this 

 insect, which in Canadian literature was previously known a.s Taxonus nigrisoma 

 Nort., was abundant throughout eastern Canada, and its well-known habit of 

 boring into apples in autumn was complained of. The same injury was noticed at 

 Ottawa. In 1902, Fletcher* first recorded such injury to apples in Ontario, 

 which was also in that year observed at Ottawa. The hirva. which is known as the 

 Dock False-worm, usually feeds on plants of the Dock family. Its habit of boring 



*33rd Annual Report of the Ent. Soc. of Ontario. 



