Milichiidae

Milichiidae are a family of flies. Most species are very small and dark. Details of their biology have not yet been properly studied, but they are best known as kleptoparasites of predatory invertebrates, and accordingly are commonly known as freeloader flies or jackal flies. However, because of the conditions under which many species breed out, they also are known as filth flies.

==Affinities and appearance== The Milichiidae are a family of flies in the suborder Brachycera. They were at one time included in the family Carnidae. At one time or another they have been assigned to various superfamilies, including Carnoidea, Chloropoidea, and Agromyzoidea. As usual for flies of these groups, Milichiidae imagines are tiny, but their heads are comparatively large, compared to many fly species of the same size, such as those in the family Phoridae.