REPORT OF THE SOCIETY 25 



which has taken place in the various provinces, as a result of federal, provincial, 

 or other activities.. 



Federal Organization 



Since 1914, the federal entomological service has developed to a marked 

 degree (1 ) . At that time the permanent staff including entomologists and clerical 

 workers, numbered 20, in addition to which a few students were employed at 

 Ottawa, during the summer months. To-day the permanent staff numbers 

 58 and in addition, in 1923, 61 temporary assistants were employed; of this 

 total, 15 comprised the clerical staff. In 1914, there was no divisional organ- 

 ization at Ottawa; now there are, in addition to my own administrative 

 division, four definite divisions, namely: Division of Field Crop and Garden 

 Insects, (R. C. Treherne, Chief in charge) (2); Division of Forest Insects, (J. M. 

 Swaine, Associate Dominion Entomologist in charge); Division of Foreign 

 Pests Suppression, (L. S. McLaine, Chief in charge); and Division of Sj^stem- 

 atic Entomology, (J. H. JXIcDunnough, Chief in charge). Investigations 

 relating to fruit insects, live stock insects, greenhouse insects and other pests, 

 not conducted by the above divisions are under the immediate direction of 

 the Dominion Entomologist. 



Division of Field Crop and Garden Insects. 



The work of the officers of this Division has had to do with the bionomics 

 and control of such important pests as the various species of cutworms; the 

 destructive species of grasshoppers which of late years have been particularly 

 injurious in the Prairie Provinces; the European Corn Borer, of which the 

 investigations relating thereto are showing much promise; the Western Wheat 

 Stem Sawfly, which has developed to an alarming extent, particularly in 

 Manitoba and Saskatchewan, and concerning the control of which important 

 data have been secured; the Hessian Fly in Ontario, Manitoba and Saskatche- 

 wan, the so-called fly-free seeding dates for fall wheat being especially 

 investigated in the former province; white grubs, from the study of which a 

 short regular crop rotation will to a large extent prevent serious injury; alfalfa 

 insects, including special investigations relating to the Alfalfa Thrips in southern 

 Alberta; root maggots, studies of the control of which have demonstrated 

 throughout Canada the value of the corrosive sublimate remedy for the 

 Cabbage Root Maggot, and the sodium-arsenite bait combined with the sowing 

 of culled onion sets as a trap for the Onion Maggot, etc. This Division has 

 permanent field laboratories at Strathroy, Ont.; Treesbank, Man.; Saskatoon, 

 Sask.; and Lethbridge, Alta., and temporary laboratories at other points. 



a) During the eleven years of service of the late Dominion Entomologist Dr. C. Gordon Hewitt, the Dommion 

 Entomologiral Servire was developed from a very small division attached to the Experimental Farms Branch, to an 

 important feparate Branch of the Department of Agriculture. 



(2) Obit., June 7, 1924. 



