Xyela curva group

Diagnosis. Ovipositor sheath clearly curved downwards, tip round and knife-shaped with dorsal edge sloping down and ventral edge almost straight (Figs 118–120); valvula 1 with small preapical dorsal tooth, distally with 12–14 oblique, closely spaced annuli, valvula 2 in distal half with 10–13 mostly vertical annuli and clear sclerotization on lateral wall around groups of sensilla campaniformia (Figs 124–125); lateral lamella of valviceps vertical with proximal edge convex and distal base concave, distal flagella often projecting beyond distal lobe of valviceps (Figs 136–139).

Species included. Xyela curva in the West Palearctic and X. exilicornis, X. japonica and X. occidentalis in the East Palearctic.