WAcnemia is a genus of fly belonging to the family Mycetophilidae.
WDasyrhamphis is a species of 'horse fly' belonging to the family Tabanidae subfamily Tabaninae.
WFergusonina, the sole genus in the family of Fergusoninidae, are gall-forming flies. There are about 40 species in the genus, all of them producing galls on Eucalyptus, Melaleuca, Corymbia, and Metrosideros species in Australia and New Zealand.
WMesembrinella is a genus of Neotropical flies in the family Mesembrinellidae, and formerly placed in the Calliphoridae. There are 15 described living species.
WNephrotoma is a genus of crane flies.
WNotofairchildia is a genus of moth flies in the subfamily Bruchomyiinae. Species have been recorded principally from south America, with many, including the type, transferred from the genus Nemopalpus.
WPhytobia is a genus of flies on the family Agromyzidae, with a worldwide distribution principally in Europe and the Americas.