— 31 — 



This report gives also three good drawings of the egg, larva and puparium 

 of the rose midge and one of a rose bud destroyed by the larvae of the rose midge. 



I hope these few notes on four of the Cecidomyiidae that we meet or are 

 liable to meet on our growing economic plants may be of service to some of the 

 members of our Association. 



Bibliography 



The Hessian Fly and the Western Wheat — Stem Sazv — Fly in Manitoba, Saskat- 

 chezvan and Alberta, by Norman Criddle. Dominion of Canada Bulletin 

 Series — Bulletin No. 11. 



Report of the Dominion Entomologist, C. Gordon Hewitt, D.Sc, F.R.S.C. — 1915. 



Les Principales Espeees d'Inseetes Nuisibles et de Maladies Vegetates, par le Cha- 

 noine \'. A. Huard, A.M. — Bulletin No. 23 — Quebec Department of Agri- 

 culture. 



Forty Seventh Annual Report of the Entomological Society of Ontario, 1916. 



Forty Eight Annual Report of the Entomological Society of Ontario. 1917. 



P.S. — When I copied, a few weeks ago, from the report of Dr. Hewitt for the 

 year 1914-15, the quotation concerning Dasyneura rhodophaga, I was far 

 from thinking that when I would present this paper to you the late Dr. Char- 

 les Gordon Hewitt would have left us for the hereafter. I am really deeply 

 grieved at his departure. It is very painful to think that such a gifted and 

 learned young man is no more amongst us and that he will live only in our 

 memory which will long recall his quiet behaviour and friendly way of im- 

 parting his extensive knowledge of Entomology. — J.. C. C. 



THE ESSENTIALS OF A DOMINION PLANT DISEASE SURVEY. 

 F. L. Drayton, Plant Pathologist, C. E. F., Ottawa. 



Plant pathological work in Canada is severely handicapped on account of 

 there being no organised survey of the plant diseases occurring in the Dominion. 

 My main object in choosing this subject is to stimulate discussion, in the hope that 

 many points of value in the carrying out of such a project may be brought up, and 

 your wholehearted co-operation enlisted in helping to make a survey of this kind, 

 which is to be put into operation this year, as comprehensive and as useful as 

 possible. Dr. W. H. Rankin, Officer-in-Charge of the Dominion Field Laboratory 

 of Plant Pathology in St. Catherines, has the organisation of this survey under 

 his direction, and you will no doubt shortly receive some information from him 

 on the subject. 



In undertaking a project of this kind, the greatest difficulty is going to lie in 

 the comparatively small number of possible co-operators in the Dominion in 

 relation to the large area to be covered. It will necessitate commencing in a small 



