Abstract
The community of Fort Erie, Ontario, and the waterfront zone of Buffalo, New York, form one of the many areas in the St. Lawrence River drainage system that are annually infested by large numbers of adult Trichoptera and, to a lesser degree, Ephemerida. Betten (1934) reported on a field study, conducted in 1906, of the Trichoptera found at Buffalo, N.Y. He noted the prevalent species and the extent of the problem chat the insects create for the local inhabitants. The medical aspect was investigated by Parlato (1929, 1930, 1932) and Osgood (1934). In August, 1950, an investigation of the scale, composition, and source of the trichopteran infestation and possible control measures was initiated at Fort Erie, Ontario.
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