Ormyrus nitidulus

Female about 5 mm. It is steeply hunched; body all deep metallic blue & blue-green; gaster with bands of large puncturation; dark legs with pale knees and tarsi; black antennae.  Male 2 to 2.5 mm, also steeply hunched; head green-gold; thorax & gaster deep metallic blue, purple & green; gaster with bands of prominent puncturation; dark legs with pale knees & tarsi; black antennae.  

Areas where oak trees are present.  Usually encountered on or around oak.

Flying from April to November.

Ormyrids are often recorded in association with plant galls, but are not gall-formers themselves: rather, they are parasites of the insect larvae that formed the galls (usually flies or other wasps).

True status in Britain is difficult to determine due to lack of records.

Status in Leicestershire and Rutland not known.