Athalia lugens (Klug, 1815)

Athalia lugens

This species has all tibia ringed apically with black but with darkening on at least the hind tibia and tarsae. In paler specimens, at least two thirds of the length of the hind tibia is lightly infuscate and in darker examples all tibiae and tarsae may be entirely dark on the outer face. The entire scutum is black but the pronotum, sides and underside of the thorax are orangy.
Larvae feed on cruciferous plants and are more frequent in damp places.

Size: 5-6mm

Status: Widespread

Distribution: England, Scotland, Wales, Ireland

Flight period: May to September

Plant associations: Cruciferae (crucifers, eg. mustards, radishes, etc.)

References:

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