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 Francois. Zootaxa, 2960, 8 Jul 2011: 1-77. 68 [Zoological Record Volume 147]