A very interesting collection of Ephemeroptera was brought back to Ottawa by Mr. W. J. Brown who spent the entire summer of 1929 on an insect faunal survey along the north shore of the Gulf of St. Lawrence, the survey extending from Trinity Bay in the west, where the fauna is still typically Canadian and Hudsonian, to Bradore Bay at the entrance to the Straits of Belle Isle, where the conditions are very similar to those found on the Labrador coast.