In males, all the entire abdomen is black including all sternites, the antennae are reddish-yellow. Male faces lack definition with any sutures, and the eye margins, ill-defined. The face is domed outwards between the antennae. The eighth tergite has a long medial projection.
Larvae feed on hawthorns.
Distribution: England, Scotland, Wales, Ireland
Flight period: April to July
Plant associations: Crataegus spp. (hawthorns)
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