Abstract
Baumann (1976) lists the zoogeographic range of the Nearctic “winter” stonefly genus Allocapnia as being confined to Eastern North America and the Palaearctic genus Taeniopteryx Pictet as being Amphinorth American (i.e. distributed in the east and west of the continent but not in middle). Allocapnia has never been recorded west of Ontario, in Canada, and although present in some of the east-central states of the U.S.A. (Ross and Ricker 1971) has not been collected in the north flowing Red River system. Taeniopteryx is represented on the Prairies by two species, T. parvula Banks recorded from Aweme, Manitoba and T. nivalis (Fitch) from Alberta (Ricker and Ross 1968).

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