Trichrysis cyanea

About 9mm long and a rather iridescent sea green in colour.

Associated with open habitats with aerial nesting sites of its hosts such as wooden fence and gate posts, dead trees, logs and tree stumps, and holes in mud and cob walls.

Recorded from May until September but mainly during June and July. There are a very few records from April and October. The males and females have the same flight period.

Several umbellifers are amongst the flowers it visits. It is a cuckoo wasp and its hosts include wasps of the Trypoxylon family.

This species shows a widespread distribution in southern Britain up as far as Yorkshire with isolated records from further north

Status in Leicestershire and Rutland not known.