Material examined. CANADA: Manitoba, Lake Winnipeg, South Basin, 3 larvae, 4. – 12.vi. 1969. The larval antennal apex is illustrated in Fig. 5 M.
Distribution. The species is known from Alaska, Yukon and the Northwest Territories to Quebec and Newfoundland and south to Minnesota, Michigan and South Carolina (Bilyj 1984: 666, Oliver et al. 1990: 12, Ashe &