Cerceris arenaria and C. rybyensis are the most common and most widely distributed species in their genus in Britain.
Often locally common in southern England, though, surprisingly, there appear to be no confirmed records from Wales. C. rybyensis also occurs in the Channel Islands and there is an unconfirmed record from south-west Scotland (Ayr (Richards, 1980)). In the collection of the Natural History Museum, London, there is a male of this species labelled 'Barons Court, Ireland' and collected on 18 July 1968 by F Wilson. This record is presumed to refer to Baronscourt in County Tyrone, and not to Baroncourt in County Tipperary.