| Authors(s) | Achterberg, C. van |
| Year | 1997 |
| Title | Part I. The Palaearctic genera of the subfamily Opiinae (Hymenoptera: Braconidae), with additional notes on the genus Xynobius Foerster. Part II. (J.A.W. van Zuijlen) Revision of the Northwest European species of the genera Apodesmia Foerster, Opius Wesmael, Psyttalia Walker, Phaedrotoma Foerster, and Utetes Foerster (Braconidae: Opiinae).— Zool. Verh. Leiden. |