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Show 295 a and time male sheds occurs the while of the contact with female is subimaginal pellicle. when shortly by oviposition surface the water the and the water. The eggs plummets eggs are subimago; only Copulation is followed female the dies, a the being the to the exuded upon over-wintering stage. Distribution Ephoron album is a widely distributed boreal North American species previously reported from Idaho by Britt (1962). I and have seventeen examined localities specimens from nine counties of which the following are repre- sentatlve. Lewsiton (In: NEZ PERCE Co.: Records.Britt, 1962:16). S. lNhitebird, 6-IX-58, (N), Salmon Rl v , 2 m l IDAHO Co.: New PAYETTE Co.: GFE and RKA. Plymouth, 20-VIII-47, (A), G. F. Edmunds, Sr.; Snake Riv. at Payette, 7-VIII-65, (N), at jct. v Rl Bruneau Ida. Hwy. #51, 1 mi. OWYHEE Co.: GFE. , , ' , LINCOLN S" Bruneau, 30-VIII-65, (N), SLJ and JWJ, (uu/ur). JEROME Co. : 10 mi. S" Shoshone, 3-IX-44, (A), GFE. Co.: 7 mL NE" Jerome on U"S. Hwy. #93, 5-IX-44, (A), GFEj (+ 3). TWIN FALLS Co.: 3 mi. E. Murtaugh on U"S" HWy. #30, 2-IX-44, (A), GFE; Twin Falls, 16-VIII-64, (A), AVN and WCP, (UU/UI). Raft Riv. at jct. U.S. Hwy. #30, 13 mi. N" CASSIA Co.: FRANKLIN 23-VII-64, (N), SLJ, PSL, and FDI; (+ 1)" Strevell, Co.: (A), Bear ARG. Riv. on U.S. Hyw. #81, nr" Preston, 12-VIII-54, |