CONTENTS 
CHAPTER PAGE 
I. INTRODUCTION ------ I 
II. GALLS CAUSED BY SAW-FLIES AND GALL-WASPS 
(hymenoptera) - - - - 18 
III. GALLS CAUSED BY BEETLES (COLEOPTERA) - - 46 
IV. MOTH GALLS (LEPIDOPTERA) - - - - 53 
V. GALLS CAUSED BY FLIES (DIPTERA) - - - 59 
VI. GALLS INDUCED BY PLANT-LICE (HOMOPTERA) - 77 
VII. GALLS CAUSED BY MITES (ACARl) - - 92 
VIII. EELWORM GALLS (NEMATODA) - - - - 106 
IX. GALLS CAUSED BY FUNGI AND MYCETOZOA - - 114 
CATALOGUE OF BRITISH PLANT-GALLS - - 127 
BIBLIOGRAPHY ------ 253 
DESCRIPTIONS OF THE PLATES - - - - 260 
INDEX ------- 267 
Xlll 
