CONTENTS. 



CHAPTER I. 



PAGE 



INTRODUCTION 1 



CHAPTER II. 



STRUCTURES FOR PROTECTING EGGS ..... ^ 21 



MASON-WASPS 22 



MASON-BEES 38 



MINING-BEES ......... 50 



CHAPTER III. 



CARPENTER-BEES 55 



CARPENTER- WASPS ........ 62 



UPHOLSTERER-BEES ........ 64 



CHAPTER IV. 



CARDER-BEES ......... 74 



LAPIDARY-BEES 79 



HUMBLE-BEES ......... 79 



SOCIAL-WASPS 80 



CHAPTER V. 



ARCHITECTURE OF THE HIVE-BEE . . . . . .112 



PREPARATION OF WAX . . . . . . . .115 



PROPOLIS 12(1 



THE BUILDING OF THE CELL . . 131 



