Gibbs, David. “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 2960, no. 1 (July 8, 2011): 1–77. Accessed May 3, 2025. https://www.mapress.com/zt/article/view/zootaxa.2960.1.1.