Xyela alpigena group

Diagnosis. Ovipositor sheath usually straight, wedge-shaped, black, ventral edge more or less white, basal half diamond-shaped in cross-section, with narrowly rounded tip (Figs 90, 97–102), sensilla field in obliquely lateral position with 7–9 setae (Fig. 91); valvula 2 with irregularly spaced groups of sensilla campaniformia surrounded by dense sclerotization protruding roundly from dorsal edge of valvula 2 (Fig. 122); basal and medial lobe of penis valve protruding above level of distal lobe, basal lobe rounded on upper edge and slightly protruding above medial lobe, lateral lamella usually narrow with proximal and distal edges s-shaped (Figs 3, 129–134).

Species included. Xyela alpigena and X. peuce in the West Palearctic and X. kamtshatica, X. koraiensis, X. sibiricae and X. ussuriensis in the East Palearctic.