New species, additions and possible deletions to the British Lonchaea Fallen (Diptera, Lonchaeidae).

Problems in identifying reared and trapped Lonchaea necessitate changes to the British composition of this genus. Three new species confused under L. laticornis Meigen and one new species confused under L. hirticeps Zetterstedt are described. Six species are additions and two species require confirmation if they are not to be deleted.