Synopsis
A comparison of the type-species of the genus Coelomyia Haliday (C. mollissima Haliday) with that of the genus Fannia Desvoidy (F. scalaris Fabricius) shows that these two genera cannot be maintained as equivalent phylogenetie taxa. Coelomyia is synonymized with Fannia and its species placed in Fannia, four new combinations thus being established. The mollissima subgroup is defined and its affinities shown, a new species is described, and a revised key to species is given.