. Annual report. Entomological Society of Ontario; Insect pests; Insects. ENTOMOLOGICAL SOCIETY 23 Figure 1, taken from a plate in the report of R. E. Balch for the sawfly in 1935, summarizes the position in that year. Known distribution north of the St. Lawrence just reaches Lake St. John and the south bank of the Saguenay River, while surprising isolated records have been ob- tained on either side of Lake Temiskaming. Building upon this basis, more complete information was obtained in 1936. (Fig. 2) The known distribution has been extended 200 miles down the North Shore as far as the Penteco
. Annual report. Entomological Society of Ontario; Insect pests; Insects. ENTOMOLOGICAL SOCIETY 23 Figure 1, taken from a plate in the report of R. E. Balch for the sawfly in 1935, summarizes the position in that year. Known distribution north of the St. Lawrence just reaches Lake St. John and the south bank of the Saguenay River, while surprising isolated records have been ob- tained on either side of Lake Temiskaming. Building upon this basis, more complete information was obtained in 1936. (Fig. 2) The known distribution has been extended 200 miles down the North Shore as far as the Pentecost River. The boundary completely encloses Lake St. John and the lower St. Maurice Valley, to meet the estab- lished boundary in the St. Jovite area. The Temiskaming records have grown into an infestation area extending 25 miles into Ontario and 70 miles northeastwards into Quebec. Fairly good scouting in the intervening region failed to yield any records of the sawfly between the Temiskaming and the main infestations. It was, therefore, thought possible that this gap might be bridged along the northern transcontinental Fig. 3.—Known distribution of European Spruce Sawfly in 1937. The results of 1937 (Fig. 3) confirmed this idea. Records at Forsythe, Oskelaneo and other points closed the gap; but the Gatineau-Lievre region in spite of quite extensive scouting still failed to show any sign of the sawfly. The Temiskaming infestation was found to extend northwards to reach Lake Abitibi, northwestwards into the Matachewan area of Ont- ario, and eastwards to Grand Lake Victoria. An outlying sample was re- ceived from Loring, south of Lake Nipissing (a thorough check of this area in the following year failed to reveal further specimens). In the Maritime region, the sawfly was found in western Prince Edward Island, and records for Halifax and Liverpool extended it well into Nova Scotia. This year witnessed a striking increase in population density in all areas. Further ad
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectinsects, bookyear1872
