Top of the head and the thorax (except tegulae and hind edges of pronotum) entirely black. The first tergite is also black. Only the hind legs have black rings on the apices of the tibiae and tarsi, the other legs being entirely yellow.
Larvae are unknown but thought to be associated with buttercups.
Status: Locally common
Distribution: England, Wales
Flight period: May to August
Plant associations: Ranunculus spp. (buttercups)
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
Palmer, D. and Palmer, J.P. 2015. Keys of species of Athalia in France and Italy, Flickr. [https://www.flickr.com/photos/d-jp-balmer/7996272718/in/photolist-9Ztf2g-dbAZi1-d8W2FW-9Zdz6n/] Accessed 16Apr2019