Gahan, A. B. 1919. Descriptions of seven new species of Opius (Hymenoptera-Braconidae) Proceedings of the Entomological Society of Washington 21:161-170
Gahan, A. B. 1919. Descriptions of seven new species of Opius (Hymenoptera-Braconidae) Proceedings of the Entomological Society of Washington 21:161-170