Five species of Megaxyela, including Megaxyela alisonae, n. sp., and two species of Macroxyela occur in North America. Macroxyela bicolor MacGillivray is a new synonym of Macroxyela ferruginea (Say). The species are keyed, described, and illustrated, and biological information is summarized. Hosts include hickory, pecan, and elm.
Smith, David R.; Schiff, Nathan M. 1998. The genera Macroxyela Kirby and Megaxyela Ashmead (Hymenoptera: Xyelidae) in North America. Proceedings of the Entomological Society of Washington. 100(4): 636-657.