D. Gibbs, “A world revision of the bee fly tribe Usiini (Diptera, Bombyliidae) —Part 1: Usia subgenus Micrusia, U. versicolor (Fabricius) (= black-haired species) and Usia martini François”, Zootaxa, vol. 2960, no. 1, pp. 1–77, Jul. 2011.