A dark species, almost entirely black. In the female, with some white on the inner orbit, the pronotum, the apex of the abdomen and sometimes all the sternites. Males are best identified by reference to the hypopygium and the penis valves.
Larvae thought to feed on grey willow.
Size: Females: 7.0 - 8.0mm, males: 6.0 - 7.0mm
Distribution: England, Scotland, Wales
Flight period: April to May
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
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