Acknowledgments for Illustrations 



Certain of the drawings in this book are derived from other 

 published books. Acknowledgments are due to Macmillan & Co., 

 Ltd., for Fig. 2 {Cambridge Natural History by David Sharpe), 

 Methuen & Co., Ltd., for Fig. 3 {The Principles of Insect Physiology 

 by V. B. Wiggles worth), the Author and the Clarendon Press for 

 Figs. 4, 5, 6 {The Study of Instinct by Dr. N. Tinbergen), the 

 Author and H.M.S.O. for Fig 7 {British Bark-Beetles by J. W. 

 Munro), Cornell University Press for Fig. 8 {Bees by von Frisch), 

 Columbia University Press for Fig. 9 {Ants by Wheeler), Rout- 

 ledge and Kegan Paul Ltd. for Fig. 10 {British Ants by Donis- 

 thorpe), Constable & Co., Ltd., for Fig. 12 {Social Life Among the 

 Insects by Wheeler). 



Thanks are due to the following for permission to use half-tone 

 illustrations: the Director of the Pest Infestation Laboratory, 

 Slough, Bucks, for 19 and 20; Royal Entomological Society of 

 London for 21-26; the Clarendon Press, Oxford, for 42 and 

 43 (from The Honeybee by Dr. C. G. Butler) ; and the Common- 

 wealth Scientific and Industrial Research Organization, Melbourne, 

 for 50 {Termites [Isoptera] from the Australian Region by G. F. 

 Hill). 



