Mung Moth Maruca vitrata
Wingspan 28-34 mm.
A very rare vagrant or adventive species, possibly imported from the Tropics in leguminous vegetables. Abroad, it is a pest of these types of plant, where the larvae bore into the pods.
There have only been a handful of records in Britain, mainly in southern England, but the example shown was found in Congleton, Cheshire in September 2000, where it constituted the first county record.