Xyela longula, , Dalman, 1819

Blank, Stephan M., Shinohara, Akihiko & Altenhofer, Ewald, 2013, <strong> The Eurasian species of <em> Xyela </ em> (Hymenoptera, Xyelidae): taxonomy, host plants and distribution </ strong>, Zootaxa 3629 (1), pp. 1-106 : 54

Xyela longula group

Diagnosis. Article 3 of maxillary palp 0.75–0.90 times as long as scape, clearly narrower than synantennomere 3; ovipositor 0.9–1.4 times as long as fore wing; medial part of valvula 3 diamond-shaped in cross-section ( Figs 86 , 95 ), dorsal and ventral edge of valvula 3 distally evenly narrowing to acicular tip, sensilla field absent ( Fig. 87 ); penis valve without lateral lamella, upper edge of proximal and medial lobe at almost same level, lower ergot present ( Fig. 126 ).

Species included. Xyela helvetica and X. longula in the West Palearctic.

Figures

FIGURES 86–94. Ovipositor sheath, sensilla pattern and sensilla plate (spl) at the apex of the ovipositor sheath. 86, Xyela helvetica. 87, X. longula, arrows indicate the modified hairs at apex of valvula 1. 88, X. lugdunensis. 89, X. meridionalis. 90–91, X. alpigena. 92–93, X. curva. 94, X. densiflorae.

FIGURES 95–104. Ovipositor sheaths of Xyela species. All figures at same scale. Legend: HT—holotype; PT—paratype.

FIGURES 126–135. Penis valves of Xyela species: X. longula groups, X. lugdunensis group, X. alpigena group, X. meridionalis group. 127, tentatively identified male of from Tence (France: Auvergne, MNHN), see text. 128, paratype of X. nigroabscondita.