12 PROTECTION OF PLANTS, 1915-16 



entitled "The Active Army in the Fields and Instruction in Books," in 

 which he made suggestions as to how the work of nature study might be 

 fostered in the schools. He said it was very essential that the pupils should 

 be acquainted with the common things in order that they might be able to 

 understand them when they came to deal with them in practical work on 

 the farms. 



At the evening session the president. Professor Lochhead, read a paper 

 entitled "Some Aspects of Insect Behaviour," and Dr. Matheson of Cornell 

 gave a valuable illustrated address on "Apple Plant Lice and their Control." 

 Dr. Matheson discussed the three common species of plant lice and 

 described the resemblances and differences in their life history and powers 

 of production. H. B. Roy, of the Oka Agricultural Institute, in a very 

 interesting illustrated address described the injurious effect of smelter 

 fumes on vegetation in the Sudbury district. It was very clear from the slides 

 and his descriptions that the farmers of that district suffer very severe losess 

 on account of the poisonous fumes given off from the smelters. 



The attendance of regular members was between 40 and 50, the largest 

 in the history of the Society. 



PRESIDENT'S ADDRESS 



SOME ASPECTS OF INSECT BEHAVIOUR 



W. Lochhead, Macdonald College. 



I.— INSTINCT. 



With the more intensive study of economic entomology that character- 

 izes the activities of present-day workers, considerable attention is being 

 given to Insect Behaviour in its widest sense — their behaviour towards 

 stimuli of various kinds such as temperature, light, moisture, and 

 chemicals, including poisons; their behaviour towards one another, 

 etc., etc. 



The writer recognizes at the outset the difficult nature of the subject, 

 also his own inability to discuss it adequately, but he thought that even an 

 imperfect discussion such as his might serve a useful purpose in directing 

 attention to this most interesting phase of insect life. 



