A black insect. The third antennal segment clearly shorter than the fourth and fifth combined. Hind tibia yellow-brown basally. Hind tarsus may be weakly yellow-brown basally. Middle tibia marked with yellow-brown on the external face in males and basally in females.
Larvae are mucus covered " slugworms" that feed on the leaves of various trees. They pupate in the ground.
Size: 4 - 6mm
Distribution: England, Wales, Ireland
Flight period: Bivoltine, May to June and August
Plant associations: Populus spp., Salix spp., Betula spp., and Quercus spp. (poplars, willows, birches and oaks.)
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