CONTENTS 



PAGE 



Preface .......-•• ^ 



List of Full-page Plates ix 



List op Small Illustrations xi 



Introduction .....•••• xiii 



CHAPTER I 



The Principles of Oak Gall Formation . . . 1 



CHAPTER II 



Some Features of Oak Gall Growth .... 9 



CHAPTER III 



The Numerical Aspect of Oak Galls . . .20 



CHAPTER IV 



The Cynipid^ Affecting the Oak 26 



CHAPTER V 



The British Oak 33 



CHAPTER VI 



Hints on Collecting and Mounting Oak Galls . . 40 



Teems Employed in the Synoptical Tables ... 46 



Table of Alternate Generations ..... 49 



