1. Blum, M.S. 1970. The chemical basis of insect sociality, pp. 61–94,in M. Beroza (ed.). Chemicals Controlling Insect Behavior. Academic Press, New York.
2. Cervo, R., andDani, F.R. 1996. Social parasitism and its evolution inPolistes, in S. Turillazzi and M.J. West-Eberhard (eds.). Natural History and Evolution of Paper Wasps. Oxford University Press, Oxford. In press.
3. Dani, F.R., Morgan, E.D., andTurillazzi, S. 1995. Chemical analysis of the sternal glands of the paper waspPolistes dominulus (Christ) and of its social parasitePolistes sulcifer (Zimmermann) (Hymenoptera: Vespidae).J. Chem. Ecol. 21:1709–1718.
4. Downing, H.A. 1991. The function and evolution of exocrine glands, pp. 540–569,in K.G. Ross and R.W. Matthews (eds.). The Social Biology of Wasps. Comstock, Ithaca, New York.
5. Downing, H.A., andJeanne, R.L. 1983. Correlation of season and dominance status with activity of exocrine glands inPolistes fuscatus (Hymenoptera: Vespidae).J. Kans. Entomol. Soc. 56:387–397.