Australian Dixidae [Dipt.]

Previously nothing was known of the representatives of this family in Australia except a record of Skuse saying that he knew three species belonging to the genus Dixa in New South Wales; they remained, however, undescribed, and I have been unable to find the specimens in his collection, preserved pro parte in the Australian Museum in Sydney and pro parte in the Macleay Museum in Sydney University.
During a short stay in New South Wales and Victoria and one summer spent in Tasmania, I found five species of Dixa, and recently Mr. A. J. Nicholson discovered another in New South Wales, which he kindly gave me for study, for which loan I am much obliged to him.
These Australian species indubitably belong to the genus Dixa, as they differ very little from the forms of the rest of the world; like them, they are differentiated from each other by mere details of colouration, relative length of antenna, peculiarities of venation such as the position of r-m and relative length of fork of R2,3 and chiefly by the structure of the hypopygium. André Léon Tonnoir (9 April 1885 - 30 January 1940), was a Belgian entomologist.