A phylogenetic analysis of the tribe Azeliini (Muscidae) was conducted, as well as a revision and phylogenetic analysis of the genus Thricops Rondani. Forty-four valid species and two subspecies of Thricops were recognised, including six species new to science. All species of this genus have been redescribed and illustrated, and a key to the world fauna is presented. An exemplar-based phylogenetic analysis of Thricops was conducted using three different sources of data: morphological characters of the adults, nucleotide sequence from the nuclear gene white and nucleotide sequence from the subunits I and II of the mitochondrial gene cytochrome c oxidase. The monophyly of Thricops sensu lato was supported by the analysis of all individual and combined data sets. Combination of data sets increased resolution for the smaller taxon sets, where there was little missing data. The mitochondrial sequence generally provided finer resolution and better branch support than white. The phylogenetic analysis of the Azeliini was based on adult morphological characters of 32 exemplar species representing ten genera. The monophyly of the Azeliini was well supported by eight apomorphic characters. The genus Australophyra Malloch was removed from synonymy with Hydrotaea R.-D. and reinstated, Megophyra Emden was synonymized with Neohydrotaea Malloch, and Crucianella Xue & Mang was synonymized with Xestomyia Stein. A number of new combinations resulted from these new synonymies. A generic key to the Azeliini was presented, and all genera redescribed according to the new limits defined in this study.

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