Abstract
Abstract The nymphs of two uncommon stonefly species Calileuctra dobryi Shepard & Baumann and Haploperla chilnualna (Ricker) are described and illustrated from correlated and reared specimens collected from California streams from 2004 to 2006. The diagnostic characters of these nymphs of both species affirm the nymphal generic characters for Calileuctra (Leuctridae) and Haploperla (Chloroperlidae) proposed by Stewart & Stark (2002). Absence of Calileuctra dobryi in interrupted and intermittent streams in drought years suggest that it is capable of having extended egg diapause and flexible univoltine to semivoltine life cycles similar to some species of Zealeuctra.
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