1918 ENTOMOLOGICAL SOCIETY. 41 



this will prove very unsatisfactory. I cannot help believing that it does not 

 penetrate through in many cases and so does not kill all the eggs, at any rate it 

 did not seem to me to have done so even when eggs were examined several days 

 after treatment. 



The removal of egg masses when numerous on tall trees is a very great task. 

 I observed that many of them, in fact a very considerable percentage, were 

 situated near the top of the trees in the crotches of branches, often not more 

 than one inch in diameter. Fortunately, egg masses seem on lateral branches to 

 be situated either in the crotch or on the underside, not on the upper side and 

 so can readily be seen. Some, of course, are in leaves attached to twigs or 

 branches. It is very doubtful whether in badly infested city parks spraying would 



Larva and adult male of White-marked Tuesock-Moth. 



not be much cheaper than removing and gathering egg masses. I have written 

 to two firms to see whether we cannot secure at a reasonable price good outfits 

 that will throw a satisfactory spray from the ground to the top of the tallest 

 trees. I do not mean the costly type of outfit used in the Gipsy Moth work. 

 Both companies claim that they can furnish machines that they believe will 

 prove satisfactory. 



I should like information from anyone present as to what percentage of 

 eggs would hatch from egg masses removed in late autumn or winter but left 

 lying on the ground, also as to their experience with crude creosote on egg 

 masses. 



Slugs. 



I have never seen so much damage from Slugs as this year. Beans were 

 their favorite food, and these in many fields were fed upon ravenously and in 

 some cases almost defoliated. Paris green as tested by myself and also by Mr. 

 Baker failed to control them. Lime was not available in the district where I 

 was, but hydrated lime as applied late in autumn killed them if used freely. 

 I am not sure whether it would prove satisfactory on a large scale in spring or 

 early summer when they are most destructive. Lime-sulphur will kill but not at 

 the strength the plants are likely to stand without injury. 



Thh Seed Corn Maggot {Pegomyia fusciceps). 

 This insect caused much injury to beans in many districts. 



- The Wheat Midge {Contarinia tritici). 



Wheat in Wentworth, Lincoln, Welland and Haldimand suffered considerable 

 loss from the Midge. In some districts about 10 per cent, of the kernels were 

 affected. Only eight adults emerged this year under normal conditions in our 



4 E.S. 



