Recorded widely across all of mainland Britain (Musgrove, 2023).
One of the black and orange species. The thorax, head and wings are black. The legs are dark at the bases and tarsi. The abdomen, femora and tibia are orange. Only females are known in Britain and Ireland.
Eutomostethus luteiventris larvae feed inside the stems of soft rush.
Size: 5 - 7 mm.
GB IUCN Status: Common
GB Rarity Status: Common
Distribution: England, Scotland, Wales, Ireland
Flight period: May to July
Plant associations: Juncus effusus (soft rush)
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
Musgrove, A.J. 2023. A review of the status of sawflies of Great Britain - Phase 2: The Athaliidae and the Tenthredinidae (excluding Nematinae). Natural England, unpublished