Dolichopodidae, the long-legged flies, are a large, cosmopolitan family of true flies with more than 8,000 described species in about 250 genera. The genus Dolichopus is the most speciose, with some 600 species.

Chrysotus is a genus of flies in the family Dolichopodidae. It is one of the largest genera in the subfamily Diaphorinae, with more than 460 species. However, the genus is probably paraphyletic, and possibly even polyphyletic, with respect to several related genera such as Achradocera, Falbouria and Lyroneurus.