CONTENTS. 



Preface .... 

 List of Full-page Plate.s 

 List of Small Illustrations 



CHAPTER I. 

 Wh.\t is a Vegetable Gall? . 



CHAPTER n. 

 The Sizes, Shapes, and Colours of Galls . 



CHAPTER HI. 

 The Collecting, Mounting, and Preserving Galls 



CHAPTER IV. 

 The Emersion of the Lmagines 



CHAPTER V. 

 The Mode of Growth and Classific.\tion of Galls 



CHAPTER VI. 

 The Agents concerned in the Production of Galls 



The Root-galls 39 



The Stem-galls S3 



