Lonchaea affinis Malloch (Diptera Lonchaeidae) new to Britain and its separation from Lonchaea laxa (Collin).

During recent work on the ecology and status of Lonchaeidae in Britain we examined several specimens of Lonchaea laxa Collin both from our own fieldwork and also specimens from the British Museum and the Verrall-Collin collection at the University Museum, Oxford. These fell into two geographical groups, one from southern England and Wales and one centred on the Scottish Highlands