The willow wood-wasp is one of three species in the genus in Britain. The abdomen is black dorsally with a red girdle covering at least tergite four and has lateral white spots.
Larvae bore into the wood of ailing or dead willows.
Size: 6 - 18mm
Distribution: England, Wales
Flight period: June to August
Plant associations: Salix spp. (willows)
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