Figures 50-53 from: Prous M, Vikberg V, Liston A, Kramp K (2016) North-Western Palaearctic species of the Pristiphora ruficornis group (Hymenoptera, Tenthredinidae). Journal of Hymenoptera Research 51: 1-54. https://doi.org/10.3897/jhr.51.9162

Figures 50-53 - Lancets of Pristiphora melanocarpa and Pristiphora ruficornis showing variation in the shape of the tangium. Lancets shown here clearly lack small outgrowth between tangium and laminum, which can be seen at least in Figs 48–49 50 Pristiphora melanocarpa PR.440VV 51 Pristiphora melanocarpa PR.407VV 52 Pristiphora ruficornis PR.479VV 53 Pristiphora melanocarpa PR.723VV reared ex larva from Betula pendula.