One of a complex of four species: arcuata, brevicornis, notha, schaefferi. Males of the four species cannot always be reliably separated, though Taeger has produced a key to males on the continent. Females of Tenthredo notha can be separated by the shape of the hypopygium and the hind tibia being marked with black apically. The broad yellow band on tergite one does not narrow at the lateral edges.
Larvae feed on clovers and vetches.
Size: approx. 9 - 11mm
Distribution: England, Scotland, Wales, Ireland
Flight period: July to August
Plant associations: Trifolium repens (white clover) and Vicia cracca (tufted vetch)
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
Fekete, K. (2018) Beginner’s guide to identifying British Tenthredo, Natural History Museum, London. http://www.nhm.ac.uk/content/dam/nhmwww/take-part/identification-trainers/sawflies-guide-id-trainees.pdf [Accessed 26Apr2019]
Taeger, A., (1988) Dritter Beitrag zur Kenntnis der Blattwespengattung Tenthredo L. (Hymenoptera: Symphyta: Tenthredinidae), Beitr. Ent., Berlin