A recognisable elongate Nematus with a torpedo-shaped body. In both sexes the abdomen is dark with a red girdle. The mesonotum and mesopleura are dulled by heavy punctures and surface sculpture.
Larvae feed socially on hawthorn and blackthorn.
Size: Female: 8 - 11mm
Distribution: England, Scotland, Wales, Ireland
Flight period: April to June
Plant associations: Crataegus spp. and Prunus spinosus (hawthorns and blackthorn)
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