Dolichopus calinotus Loew (Diptera, Dolichopodidae) new to Britain and Belgium

Dolichopus calinotus Loew, 1871 was recorded from a saltmarsh in Kent, south-east England, in the summer of 2016. It is here also recorded for the first time from Belgium, where it is known from three different sites. Its habitat preference in Europe is uncertain but in north-western Europe it seems to be confined to coastal brackish marshes and saltmarshes at the coast or along tidal rivers. The species is rare across its range and this may account for it not having been previously detected in Britain. Modifications to the standard British identification guide are given for both sexes.