Buckingham, G. R. 1968. Pygidial glands in male Opius (Hymenoptera: Braconidae) Annals of the Entomological Society of America 61:233-234
Buckingham, G. R. 1968. Pygidial glands in male Opius (Hymenoptera: Braconidae) Annals of the Entomological Society of America 61:233-234