Recorded widely throughout most of mainland Britain (Musgrove, 2023).
A small black sawfly with smokey wings. The legs are dark except for the front tibia and usually also the middle tibia. The hind margin of the mesoscutellum and the epicnemial groove are lined with large punctures. Adults can be found near water bodies where the larval food plant is present.
Stethomostus fuliginosus larvae feed on celery-leaved buttercup.
Size: 5 - 6mm
GB IUCN Status: Least Concern
GB Rarity Status: None
Distribution: England, Scotland, Wales
Flight period: May to August
Plant associations: Ranunculus sceleratus (celery-leaved buttercup)
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 Natural England, unpublished