V References 



VII Index of Scientific Names 



Page 



CONTENTS 

 Section 



I Introduction i 



Collecting 4 



Preservation and Storage 6 



Preparation and Equipment Needed for Identification 7 



II Species List and Ranges 13 



III Key to Aquatic Genera and Species of Adult Dryopoid Beetles 25 

 of the United States 



IV Key to Genera of Aquatic and Semi-aquatic Dryopoid Beetle 55 

 Larvae of the United States 



69 



VI Glossary 73 



79 



VI 1 



