CONTENTS 



CHAP. PAGE 



I. Introduction 1 



II. Fossores or Digger- Wasps : Pompilid section 5 



III. Fossores or Digger-Wasps : Sphegid section . 19 



IV. Diploptera (double-winged wasps) ... 36 

 V. Bees (Anthophila, or flower- lovers) . . 57 



VI. Long-pointed-tougued bees (Apidae) . . 73 



VII. The social-bees 87 



VIII. Some structural features : the sting and the 



"tongue" 108 



IX. Collecting and preserving aculeate Hymeno- 



ptera 118 



Bibliography 129 



Index ... 130 



