Abstract
New descriptions, redescriptions, taxonomical and ecological comments, and distribution records are given for known stages of 14 species of Paracladopelma Harnisch and 3 species of Saetheria n.gen. Seven species are described in all stages. Saetheria reissi n.sp., Paracladopelma winnelli n.sp., the immature stages of Saetheria tylus (Townes), Paracladopelma galaptera (Townes), Paracladopelma nereis (Townes), a larval-pupal association placed in Saetheria, and two larvae placed in Paracladopelma are new to the literature. The immature stages of Paracladopelma nais (Townes), Paracladopelma loganae Beck and Beck and Paracladopelma undine (Townes) are redescribed.Keys are provided for the known Nearctic larvae and pupae and for both Nearctic and Palaearctic adult males of Saetheria and Paracladopelma. Key words: Chironomidae, Paracladopelma, Saetheria. Great Lakes

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