A larger species and often largely reddish in colour though darker forms exist. Although the stigma is unicolorous brown the vein at the basal end can be creamy yellow giving the appearance of a bicolorous stigma in photos. The head above is punctured with a bronze reflection. The antenna is partly pale to varying extent.
Tenthredo ferruginea larvae feed on a broad range of plants including bracken, meadowsweet, plum, alder and willow.
Size: 10 - 13mm
Distribution: England, Scotland, Wales, Ireland
Flight period: June to August
Plant associations: Pteridium aquilinum (bracken), Filipendula ulmaria (meadowsweet), Prunus spp. (wild plums), Alnus spp. (alders), 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
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]