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Show 257 PSL, and FDI; Hackay (In: at Lost Riv. Big Edmunds, Allen and BOISE Co.: Hoores C, 1 mi. NE. Idaho 1962:160); (+ 6). BLAINE Co.: Big Wood Riv. at City, 7-VIII-63, (N), SLJ. jct. U.S. Hwy. #93, 4 mi. N. Hailey, 24-VII-64, (N), SLJ, FREMONT Co.: Warm Riv. N. st. Anthony PSL, and FDI; (+ 3). TETON Co.: Teton Riv., 4 mi. W. Tetonia, (In: Ibid.). 2J"="VI-(N), WFB, (UI); (+ 1). BONNEVILLE Co.: Indian Cr. at jct. U.S. Hwy. #26, 4 mi. W. Alpine, 28-VI-64, (N), SLJ and JWR; (+ 1). Ephemerella (Drunella) grandis Eaton male (1884 and subimago associated [1883-88]) female nymphs this described adults by from species a (1905) correotly Needham imago. to Eaton's Eaton the developing wing venation. (1962) separated . grandis Allen and Edmunds three Eaton, subspecies; . g. and E. . flavitincta into HcDunnough, . g. the ingens McDunnough, latter two grandis occurring in Idaho. Collections and E. Idaho. £. the southern Idaho on the nymphs ingens intergrade With influence of of vertex . E. grandis tively short ridges of have that shown across a possible exceptions broad . zone extreme of g,. grandis in central northern populations, most specimens indicate intergradation of the and the and the thorax is Typical . g. ingens have of and the head development reduced to respect thorax, head, tubercles blunt with and tubercles and of the of In abdomen the without on size abdomen. a and varying tubercles typical are rela mesonotal tubercles. head and abdomen |