Scarcer Diptera found in the Bristol Region in 1999, 2000 and 2001

Records from Somerset or Gloucestershire are presented for forty-eight species in the following families: Cylindrotomidae, Limoniidae, Ditomyiidae, Keroplatidae, Mycetophilidae, Dixidae, Rhagionidae, Stratiomyidae, Tabanidae, Acroceridae, Bombyliidae, Asilidae, Hybotidae, Dolichopodidae, Lonchopteridae, Platypezidae, Syrphidae, Pipunculidae, Micropezidae, Lonchaeidae, Conopidae, Ulidiidae, Tephritidae, Lauxaniidae, Chamaemyiidae, Sciomyzidae, Clusiidae, Heleomyzidae, Drosophilidae, Chloropidae, Ephydridae, Scathophagidae, Muscidae, Fanniidae, Calliphoridae. Tachinidae. Comments are made on their past and present status in this district.