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Show 266 have examined been from a single locality. LEMHI Co.: Records.Opal Cr. at jet. Panther Cr., 18 mi. Jensen and Edmunds, 1966). W. Cobalt (In: BLAINE Co.: Upper Sawtooth Valley below Galena Pass, 23-VII-65, (N), WFB, (UI). Ephemerella (Ephemerel1a) aurivillii (Bengtsson) (Figures 163, 183-184) Chitonophora aurivillii Bengtsson, 1908:243; Bengtsson, 1930:3 (= aroni Eaton, 1908). Ephemerel1a aroni Eaton, 1908:149; Walley 193;:17 aurrvITlii Bengtsson, 1908; norda lcDunnQugh, ( = -- 1924b). 1953: Ephemerel1a aurivillii, McDunnough, 1931c:197; Burks, 69 (= concinnata Traver, 1934). Bengtsson (1908) described this species from of collected adults in Sweden. Taxonomy and This species in the of provide descriptions Allen and Edmunds male imagos and mature series a (1965) nymphs. Biology species the is easily distinguished from all subgenus by characters given Allen and Edmunds statement with regard to (1965:276) the make the in the other keys. following nymphs: of . aurivillii varies in the The paired dorsal abdominal tubercles. populations from Eastern North America usually have very small blunt abdominal tubercles and on many specimens whereas specimens , they are barely discernible ••. character The of nymphal stage the . from . • in Northwestern North America have Only 2 sharper abdominal tubercles populations longer and .••• |
