Cheilosia ahenea (von Roser, 1840)
Biology & ecology:
Very little is known about its ecology. The larva is unknown but may be a stem or root borer as most other members of the genus adopt this larval feeding strategy. The known locality is Machair grassland but in Ireland it has been found on limestone grassland and adjacent sand dune systems.
Known from just a single location on Islay. It may prove to be more widespread on dunes of the western Isles as it is also known from several localities along the west coast of Ireland.