(Figs 1, 2 D; 3 D; 4 D, K; 5 B, G; 7 D–F; 10)
Ablabesmyia (Ablabesmyia) auriensis Roback Ablabesmyia (Ablabesmyia) ornata Beck et Beck Ablabesmyia (Ablabesmyia) tarella Roback
Material examined. CANADA: Manitoba, Pinawa, male reared from larva, 25.vii 1967, J. Ireland; Manitoba, Rat River south of Woodridge, sandy silt, 0.2 m, female reared from larva, 23.vi. 1967, A. L. Hamilton, B. Hauser, and O. A. Saether; British Columbia, Marion Lake, at dock, male, 17.vii. 1965, A. L. Hamilton. Lake Winnipeg records: Gull Harbour, 2 males, 16.vii. 1969; Gimli Government Wharf, 1 male, 24.vii. 1969; Grand Rapids Government Wharf, 3 males, 28.vii. 1969; Pine Dock, 1 male, 31.vii. 1969; Beaver Point, 3 males, 30.vii. & 19.viii. 1971; 20 Mile Creek, 1 male, 22.vii. 1971; Old Fishing Dock, 9 males, 29.vii. – 18.viii. 1971; Calder's Dock, 2 males, 26.viii. 1971; Calder's Dock, 5 males, 27.vii. 1971; Beaver Creek, emergence traps, 3 males, 19.vi. – 25.vii. 1971; South Basin, 3 larvae, 24.vii. – 1.viii. 1969; Narrows, 3 larvae, 9. – 17.viii. 1969.
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This species was one of the three present in the bottom samples from Lake Winnipeg. The male and the immatures are illustrated.
Distribution. The species is widespread Nearctic (Roback 1971: 367, 1985: 194; Oliver et al. 1990: 10; Spies 1999; Hudson et al. 1990: 3; Epler 2003, 2010; Caldwell 2009; Ashe & O’Connor 2009: 116).