1910 ENTOMOLOGICAL SOCIETY. 15 



trees. I sent it to Mr. Gibson at Ottawa, and lie determined it as the Woolly Elm- 

 Bark Aphid (Schizoneura Rileyi). They have treated some of the infested tree< 

 with whale oil, as Mr. Gibson recojnmended, and found the results satisfactory. 



The Aphid seems, at first, to have been confined to small trees; but Mr. 

 Cameron, the Park Commissioner's assistant, says that it has also begun to attack 

 the small branches of the larger Elm trees, and he fears that it will give them a 

 good deal of trouble before it is eradicated. 



Prof. Eamsay Wright had during this summer a good many of his dahlias 

 injured by a bug, which pierces the plant just below the flower bud, and so spoils 

 the blossom. He brought a specimen down to the Museum, but it was mislaid 

 somewhere so that I cannot give the name of the species. 



I asked another gentleman, who grows dahlias in the west end of Toronto, 

 if his plants had been injured in tliis way. He replied that he had not seen any 

 bugs on them, but his dahlias had been a failure this year. Perhaps the bugs may 

 have done some of the mischief without being detected in it. 



Division No. 4. — East Toronto District. By C. W. Nash, Toronto. 



The summer of 1909 was remarkable for the dearth of insect life in this 

 neighborhood. Even such butterflies as the Cabbage White, Clouded Yellow and 

 Monarch were remarkably scarce and little or no damage was done by the larvae 

 of the Cabbage butterfly in the large market gardens of East York, The Monarch 

 (Anosia archippiLs), which usually appears early in June was not seen until the 

 first week in July. From that time to early September, when the southward flight 

 lakes place, only an occasional specimen was visible. No great host of these 

 insects passed from east to west when migrating as in former years, so that if they 

 do not breed in the south this winter it would seem probable that the species would 

 be very rare in Canada next summer. 



Papaipema cataphracta, the larvae of which, by boring into the stems of plants, 

 have during the last few years done much mischief in flower and vegetable gardens, 

 were not noticed at all this season nor did I find P. purpurifascia in the roots of 

 Aquilegias. 



It would be interesting to know the cause of the almost total disappearance 

 of Cosmopepla carnifex. For some years this insect increased yearly with astonish- 

 ing rapidity, reaching its maximum in 1907, when the stems of all the Aquilegias, 

 Penstemons and some few other plants grown near here were literally covered with 

 them. In 1908 their numbers were greatly reduced and this last summer I only 

 saw one specimen. There were no evidences of parasites having attacked them. 

 It seems probable, therefore, that weather conditions of last winter were unfavour- 

 able and that they perished while hibernating. 



The larvae of the Tussock Moth though extensively parasitized in 1908 were 

 about as abundant as usual on the shade trees of Toronto. 



Various matters referred to in the Directors' Eeports were discussed by Messrs. 

 Caesar, Treherne, Hewitt, Bethune, Jarvis, Tothill, Nash, Gibson and others. The 

 Woolly Aphis was stated to be rarely found on the roots of apple trees in the 

 Niagara district; it hibernates as a stem-mother in the crevices 'of bark, and early 

 in spring new colonies are produced. It was reported that in many parts of Ontario, 

 where grasshoppers were so abundant this year, the Criddle mixture was found to 



