Genus Orphnabaccha Hull

Orphnabaccha Hull, 1949a: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).