Lancets of P. melanocarpa and P. 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 P. melanocarpa PR.440VV 51 P. melanocarpa PR.407VV 52 P. ruficornis PR.479VV 53 P. melanocarpa PR.723VV reared ex larva from Betula pendula.

 
 
  Part of: 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