Ditomyiidae Keilin, 1919
* Dixidae Schiner, 1868 - meniscus midges
* Hesperinidae Schiner, 1864
* Keroplatidae Rondani, 1856 - predatory fungus gnats
* Limoniidae Rondani, 1856 - limoniid crane flies
* Lygistorrhinidae Edwards, 1925