| Chapter I. The Harmas | 1044 |
| Chapter I. Bramble-Dwellers | 778 |
| Chapter IV. The Mother Decides the sex of the egg | 745 |
| Chapter XI. The Poison of The Bee | 1620 |
| Chapter XII. The Halicti: a Parasite | 717 |
| Chapter VI. The Red Ants | 776 |
| Chapter VIII. Parasites | 611 |
| Chapter IX. The Theory of Parasitism | 646 |
| Chapter X. The Tribulations of The Mason Bee | 929 |
| Chapter I. The Pompili | 967 |
| Chapter II. The Scoliae | 658 |
| Chapter III. A Dangerous Diet | 1253 |
| Chapter IV. The Cetonia Larva | 1185 |
| Chapter V. The Problem of The Scoliae | 676 |
| Chapter VII. Change of Diet | 660 |
| Chapter VIII. A Dig at The Evolutionists | 1218 |
| Chapter IX. Rationing According to Sex | 1019 |
| Chapter X. The Bee Eating Philanthus | 546 |
| Chapter XI. The Method of The Ammophilae | 579 |
| Chapter XII. The Method of The Scoliae | 620 |
| Chapter III. The Method of The Calicurgi | 953 |
| Chapter XIV. Objections and Rejoinders | 709 |
| Chapter III. Another Prober (Perforator) | 778 |
| Chapter XI. The Eumenes | 799 |