Gyrinus dichrous LeConte, 1868

NOVA SCOTIA: Guysborough Co.: Sherbrooke, 10.VIII.1971, B. Wright (1, NSMC) ; Halifax Co.: Doyles Lake, 22.VIII.1947, D.A. Livingston and L. Decker (183, NSMC) ; French Village, 9.VIII.1945 (2, NSMC) ; Lake Egmont, 30.IV.1990, 15.VIII.1990, 1.XI.1990, B. Wright (42, NSMC) ; Point Pleasant Park, 5.VIII.2001, C.G. Majka, small pond (1, CGMC) ; St. Margaret’s Bay, 4.VIII.1945, J.H. McDunnough (11, NSMC) ; Hants Co.: Lily Lake, 4.VII.1947, 14.VII.1947, D.A. Livingston (2, NSMC) .

Gyrinus dichrous is newly recorded from Nova Scotia (Fig. 9). Robert (1955) indicated that the species was found mostly in eutrophic lakes and Morrissette (1979) reported it from clear, deep lakes. Oygur and Wolfe (1991) reported that 100% of specimens came from lentic habitats.