In the female the metanotum is entirely yellow and the head is also yellow. The abdomen may or may not have black spots along the dorsal midline. In the male the apical two tergites are mainly black. The inner orbits are yellow.
Larvae are solitary edge feeders on grey willow and common osier.
Size: Female: 5.5 - 7.0mm.
Distribution: England, Scotland, Wales, Ireland
Flight period: May to June, July to August
Plant associations: Salix atrocinerea and Salix viminalis (grey willow and common osier).
The National Biodiversity Network records are shown on the map below. (See terms and conditions)
Benson, R.B., 1952. Handbooks for the Identification of British Insects. Hymenoptera, Symphyta, Vol 6, Section 2(a-c), Royal Entomological Society, London
Liston A, Knight G, Sheppard D, Broad G, Livermore L (2014) Checklist of British and Irish Hymenoptera - Sawflies, ‘Symphyta’. Biodiversity Data Journal 2: e1168. https://doi.org/10.3897/BDJ.2.e1168
Muche, W.H., 1974. Die Nematinengattungen Pristiphora Latreille, Pachynematus Konow und Nematus Panzer (Hym., Temthredinidae). Deutsche Entomologische Zeitschrift, 21(1/3), pp.1-137.
Prous, M., Liston, A., Kramp, K., Savina, H., Vårdal, H. and Taeger, A., 2019. The West Palaearctic genera of Nematinae (Hymenoptera, Tenthredinidae). ZooKeys, 875, p.63-127