For a number of the text cuts used in this volume we are indebted to the courtesy of Dr. E. A. Birge, Director of the Wisconsin Geological and Natural History Survey.

.

CONTENTS

CHAPTER.PAGE
I.Communal Life[1]
II.Ammophila and her Caterpillars[15]
III.The Great Golden Digger[56]
IV.Several Little Wasps[72]
V.Crabro[97]
VI.An Island Settlement[119]
VII.The Burrowers[141]
VIII.The Wood-Borers[178]
IX.The Spider-Hunters[196]
X.The Enemies of the Grasshopper[248]
XI.Workers in Clay[265]
XII.Sense of Direction[275]
XIII.Instinct and Intelligence[292]

.