1. Department of Entomology; North Dakota State University; Fargo; ND; 58105; USA
2. Electron Microscopy Center; North Dakota State University; Fargo; ND; 58105; USA
3. Institut de Biologie Moleculaire des Plantes; CNRS; Strasbourg; 67084; France
4. Department of Entomology; Purdue University; West Lafayette; IN; 47907; USA