1. Leius, K. Can. Entomol. 42, 369–376 (1960).
2. van Emden, H. F. Entomol. Mon. Mag. 98, 265–270 (1963).
3. Vinson, S. B. in Comprehensive Insect Physiology Biochemistry and Pharmacology (eds Kerkut, G. A. & Gilbert, L. I.) 417–469 (Pergamon, Oxford, 1985).
4. Drost, Y. C., Lewis, W. J., Zanen, P. O. & Keller, M. A. J. chem. Ecol. 12, 1247–1262 (1986).
5. Lewis, W. J. & Tumlinson, J. H. Nature 331, 257–259 (1988).