TABLE OF CONTENTS. 



PAGE 



Acknowledgments 3 



Foreword 7 



Introduction 8 



Survey of Families Including a Synoptic Key to Aquatic and 



Semiaquatic Hemiptera, (Key p. 11) 9 



Historical Sketch of the Biology of Aquatic and Semiaquatic 



Hemiptera 13 



Ecologic and Economic Relations, Including a Habitat Key to 



THE Aquatic and Semiaquatic Heteroptera. (Key p. 29), 17 



Form and Function 38 



Semiaquatics: 



Gelastocoridse — 



Taxonomy of Family 45 



Biology of Family 49 



Ochteridse — 



Taxonomy of Family 51 



Biology of Family 53 



Saldidse — 



Taxonomy of Family 54 



Biology of Family 79 



Hehridse — 



Taxonomy of Family 82 



Biology of Family 88 



Hydrometridx — 



Taxonomy of Family 91 



Biology of Family 92 



Mesoveliidse — 



Taxonomy of Family 99 



Biology of Family 101 



Gerridse — 



Taxonomy of Family 106 



Biology of Family - 116 



Veliidse — 



Taxonomy of Family 121 



Biology of Family 134 



Aquatics: 



Belostomatidse — 



Taxonomy of Family 141 



Biology of Family 142 



(5) 



