Parker, Frank D., and Terry Griswold. 2013. “New Species of the Cleptoparasitic Bee Genus Stelis (Hymenoptera: Megachilidae, Anthidiini) from the Nearctic Region”. Zootaxa 3646 (5). Auckland, New Zealand:529–544. https://doi.org/10.11646/zootaxa.3646.5.3.