Taxonomic and faunistic studies of the Sepsidae (Diptera) from Vietnam, with descriptions of six new species

A total of 52 species belonging to nine genera of the Sepsidae are reported from Vietnam. Of these, six species (Dicranosepsis splendifica sp. nov., D. trochanteris sp. nov., Mucha rectotibialis sp. nov., Perochaeta exilis sp. nov., Sepsis nigriminima sp. nov. and S. silvicola sp. nov.) are described as new to science. Eighteen species are newly recorded from Vietnam. Toxopoda pseudoviduata Ozerov, 2010 is synonymized with T. cavata Iwasa, 2008. The faunal composition of Vietnamese Sepsidae is divided into six groups based on distributional data and discussed. A key to the species of Vietnamese Sepsidae is also provided.