Six new species of gall midges (Diptera: Cecidomyiidae) from Melaleuca (Myrtaceae) in Australia

A new genus, Lophodiplosis Gagne, is described for five new species of gall midges from Australia associated with Melaleuca spp. At least two of these are candidates for biological control of the introduced pest, Melaleuca quinquenervia, or paperbark, in Florida. In addition, a new species of Lasioptera is described. The new species are: Lophodiplosis indentata and Lophodiplosis denticulata that form blister galls on leaves of Melalenca spp.; Lophodiplosis bidentata, responsible for rosette bud galls on Melaleuca spp.; Lophodiplosis cornuata, forming trumpet-shaped leaf galls on Melaleuca viridiflora; Lophodiplosis trifida, an inquiline in galls of L. indentata, L. denticulata, and L. bidentara; and Lasioptera uncinata, an inquiline in galls of L. indentata and L. cornuata. Keys are given to adults of Australian genera of the supertribe Cecidomyiidi and to adults and pupae of the six species found on Melaleuca spp. during this study.