Length 8 to 11 mm. Similar to several other Tenthredo species, particularly Tenthredo notha, with an abdomen that is banded with greeny-yellow and black and wings that are slightly shaded brown with a long brown stigma along the edge.

This species has a red ID rating and unless identified by a known expert you must provide a satisfactory explanation of how it was identified for the record to be accepted.

Flower rich meadows.

April to July.

The nocturnal larva grazes the leaves of White Clover.

Widespread and fairly frequent in Britain.

Status in Leicestershire and Rutland not known.

https://www.sawflies.org.uk/tenthredo-arcuata/