The Chinese fauna of the Fannia postica-group Chillcott (1961) is reviewed, the diagnostic features of this group are redefined, one new species, Fannia nudifemoratasp. n., is described, and a key to the males of nine known species is given. One new junior synonym, Fannia tigripeda Xue, Wang&Li, syn. n. for Fannia stigi Rognes is established. To facilitate comparisons of the species, Fannia aethiops Malloch, Fannia ardua Nishida, Fannia discoculea Xue, Fannia ringdahlana Collin, Fannia postica (Stein), Fannia spathiophora Malloch, and Fannia stigi Rognes are redescribed and illustrated. The geographic distribution of the known Chinese species is updated.
Keywords: Diptera; Fannia; Fannia postica-group; Fanniidae; new species.