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Show 229 Family EPHEMERELLIDAE Subfamily Ephemerellinae This single family and represented in Idaho by is subfamily Ephemerella Walsh. genus, Genus Ephemerella Walsh following combinations The this tinguish genera caudal 155); occurring filaments or to and in most of of male with gills segment (2) paired species forewings, on or on segments similar tubercles to present absent segments three three those or to four succeeding on (Figs. or absent on abdominal (Figs. 171-174, 180-181, 183-184). the North American to eight subgenera, six of Drunella nd (Figs. 154- (1959b) assigned in Idaho: developed (1) Gills Nymphs. rudimentary one and single short a Edmunds Ephemerella occur on well with abundant venation semi-operculate, segments; gills terga margin (Figs. 156-168). seven; Three dis marginal intercalaries segment two; gills present four operculate, 152-153); outer (3) genital forceps abdominal seven the large hind wings and (2) present; to serve families other (1) Adults. short 1862 charaoters of from all genus in Idaho: along terminal segment on and family between veins rather a Attenuatella Neeqham, Ephemerella which are species known of to Edmunds, Caudatella Edmunds, Walsh s.s., Serratella Edmunds, |
