7-8mm. All orange-bodied apart from a black scutum (top of the thorax). Tibia and tarsi are at least black-ringed at their apices but can be all black. The wings have a dark costa along the full length and can be slightly smoke-tinted.

Other Athalia

Wet places, where the larvae feed on crucifers

May - September

Fairly common and widespread

Uncommon though likely to be under-recorded.

https://www.sawflies.org.uk/athalia-lugens/