Figures 6- 7 from: Verheyde F, Sioen G (2019) Outbreaks of Tomostethus nigritus (Fabricius, 1804) (Hymenoptera, Tenthredinidae) on Fraxinus angustifolia 'Raywood' in Belgium. Journal of Hymenoptera Research 72: 67-81. https://doi.org/10.3897/jhr.72.38284

Figures 6- 7 Thousands of larvae of Tomostethus nigritus on the stem of a tree (left) and a lamppost (right), Ghent (BE), 30.IV.2019 Fons Verheyde.