Published online by Cambridge University Press: 31 May 2012
In certain years, adult sawflies constitute a conspicuous feature of the insect fauna which rests on foliage or visits flowers on the Canadian prairies and in neighbouring woodlands.
The most intense “outbreak” of these insects observed by the writer occurred in 1929 when they were by far the most conspicuous representatives of the insect fauna near Gull Lake, Alberta. In that year, in less than two weeks during early June, 53 species were taken in an area of about a half-mile square.
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