FAMILY SYRPHIDAE Author Montoya, Augusto L. text Zootaxa 2016 4122 1 457 537 journal article http://dx.doi.org/10.11646/zootaxa.4122.1.39 9da11240-9dca-4e34-bf1a-0d080fd89ef9 1175-5326 259323 F95F1B6A-A1BB-46EE-95E3-0B8C5B16ADA0 Genus Orphnabaccha Hull Orphnabaccha Hull, 1949 a : 93 . Type species, Baccha coerulea Williston, 1891 (orig. des.). Mercurymyia Fluke, 1950 : 140 Type species, Epistrophe caldus Walker, 1852 (orig. des.). (Proposed as a subg. of Stenosyrphu s). Synonymy Thompson et al. 1976 : 11 . Refs.: Vockeroth, 1969 : 118 (Description, taxonomic notes).