Coloured green in life. The female is marked with black on the upper surface of the antennae, a small ocellar mark and a small spot behind the postocellar area, on the mesonotum, adjacent to the scutellum, the scutellar appendage, small dot-shaped spots in front of the scutellum and the abdomen which is mostly blackened only in the middle of the basal tergite. The male is like the female, but with black on a large frontal postocellar stain, the occipital area, most of the mesonotum, the scutellum and a broad streak on the dorsum of the abdomen.
Larvae are undescribed but associated with bay willow in Britain.
Size: Female: 5.0 - 6.5mm, male: 5.0 - 6.0mm.
Distribution: England, Scotland
Flight period: Assumed May to June, July to August
Plant associations: Salix pentandra (bay willow)
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