1. Cullen, M. J. J. Ent. A 49, 17–41 (1974).
2. Pringle, J. W. S. Symp. R. ent. Soc. Lond. 7, 3–15 (1976).
3. Josephson, R. K. J. exp. Biol. 59, 781–801 (1973).
4. Greenewalt, C. H. Smithson. misc. Collns 144, 1–46 (1962).
5. Weis-Fogh, T. in Scale Effects in Animal Locomotion, 405–420 (Academic, New York, 1977).