Length 6 to 10 mm. This species is very similar to many others in the genus Dolerus. It is mainly black, with a pronounced dark stigma on the leading edge of each wing.

Unless identified by a recognised expert, a photo is required and the specimen should be examined with a microscope. In the comments box, state the key or ID method used and describe the size and identifying characters.

Meadows and damp grassland.

April to July

Widespread and fairly common in Britain.

Common in Leicestershire and Rutland.

https://www.sawflies.org.uk/dolerus-poodolerus-aeneus/