The head has a black spot between the ocelli and the depressed parts of the metanotum in front of the cenchri are black. In the female the abdomen is entirely yellowish at most with basal tergites in the middle with small black dots. The male has light brown antennae with the underside yellowish. According to Muche, the degree of the black colouration on continental specimens is variable and the mesonotum and top of the abdomen can be extensively black.
Larvae feed on grey willow.
Size: Female: 5.5 - 6.5mm, male: 5.0 - 6.0mm.
Status: Data deficient
Distribution: England, Scotland, Ireland
Flight period: May to June, July to August
Plant associations: Salix atrocinerea (grey 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