Abstract: This paper reports the sciarid fly species on edible fungi of Yunnan province. Six genera and eleven species were identified, including one new record genus (Cosmosciara Frey), and two new record species (Bradysia difformis Frey and Cosmosciara perniciosa Edwards) in China. A key to the all species was given. All voucher specimens of the survey are deposited in the laboratory of Entomology Department, Yunnan Agricultural University. Analysis of the data of the sciarid fly species on different hosts indicated that Lycoriella pleuroti Yang et Zhang and B. difformis Frey were the dominant species on edible fungi in Yunnan.

Key words: Diptera, Sciaridae, Cosmosciara, taxonomy, dominant species, edible fungi