Key to Baetis spp. Couplet 713. Forceps stout, noticeably constricted at junction of second and third segments. Third somewhat inflated (fig 26). Turbinate eyes lemon-yellow. Exp. 13-17 mm.
14. Forceps slender, scarcely constricted at junction of second and third segments. Turbinate eyes warm sepia-brown. Exp. 10-15 mm.