THE CANADIAN ENTOMOLOGIST. 281 



ENTOMOLOGICAL SOCIETY OF ONTARIO. 



A summer meeting of the Society was held at the Ontario Agricul- 

 tural College, Guelph, on Thursday and Friday, July 4 and 5. Through 

 the kindness of President Creelman, the members from a distance were 

 hospitably entertained in the College residence during their visit, the 

 ladies of the party being provided for in the Macdonald Hall. The 

 number in attendance was smaller than was anticipated, many who had 

 been looking forward to taking part in the meeting being prevented from 

 coming by a variety of causes. A very satisfactory audience, however, 

 was made up by the Summer School of Ontario teachers from the Mac- 

 donald Institute, and several students and members of the College staff. 

 The sessions began on Thursday afternoon in the lecture-room of the 

 Biological Department, the President of the Society, Dr. Fletcher, of 

 Ottawa, being in the chair. Mr. H. H. Lyman, of Montreal, read a 

 paper on the distinctions between Thecla caiamis and Edwardsii. 



Dr. Brodie, of Toronto, described the life-history of a colony of the 

 Tent Caterpillar, and related his experience in breeding a large number 

 during a series of years in order to observe the effects of parasites upon 

 them. 



Dr. Fletcher gave an account of a visit he had recently paid to 

 Massachusetts, and described what was being done to control the Brown- 

 tail and Gypsy moths by the importation of parasites from Europe and by 

 practical field operations. 



Mr. C. W. Nash, of Toronto, spoke on " Balance in Nature/' in 

 which he described in a very interesting manner some of the numerous 

 checks and counter checks which are provided in order to prevent the 

 undue preponderance or the extermination of any particular species, and 

 showed how this balance had been upset by man's disturbing agency, and 

 the difficult problems that had arisen in consequence. A discussion 

 followed, which was participated in by the chairman, Dr. Brodie, Prof. 

 Bethune, Mr. Jarvis, Mr. Caesar, and others. 



In the evening the session was held in the Nature-study lecture-room 

 of the Macdonald Institute, and was attended by the Summer School and 

 a number of others from the town and College, as well as by the members 

 of the Society. Dr. Henry Skinner, of Philadelphia, gave a highly inter- 

 esting lecture on " Insects as Carriers of Disease." Mr. C. W. Nash 

 fallowed with a lively address on " Instinct vs. Education," and Dr. 

 Fletcher spoke in his usual attractive manner on " Nature Study as a 



