In the female the the head and mesonotum are mainly black and the abdomen is orange-yellow with some infuscation basally. The scutellum is mostly black but may be narrowly margined with yellow. In the male the mesopleura, the lower part of the face and the underside of the antennae are yellow and the abdomen is yellow with at most the basal two tergites marked with black. The stigma is black.
Larvae feed on white willow and crack willow.
Size: Female: 8.0 - 10.0mm, male: 6.5 - 10.0mm.
Status: Locally common
Distribution: England, Scotland, Wales
Flight period: May to June, July to September
Plant associations: Salix alba and Salix fragilis (white willow and crack 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