INTRODUCTION . 
List oF PLATES 
ERRATA . 
HALIPLIDA . 
Dytiscipé . 
GYRINID 
HYDROPHILIDA 
HETEROCERID 
PaRNIDE 
GEORISSID 
CYATHOCERID& 
STAPHYLINIDA . 
SUPPLEMENT 
INDEX 
PLATES. 
CONTENTS. 
XV1 
bS 
