| Chapter I. The Harmas | 1392 |
| Chapter I. Bramble-Dwellers | 1052 |
| Chapter IV. The Mother Decides the sex of the egg | 921 |
| Chapter XI. The Poison of The Bee | 1947 |
| Chapter XII. The Halicti: a Parasite | 895 |
| Chapter VI. The Red Ants | 960 |
| Chapter VIII. Parasites | 752 |
| Chapter IX. The Theory of Parasitism | 798 |
| Chapter X. The Tribulations of The Mason Bee | 1202 |
| Chapter I. The Pompili | 4448 |
| Chapter II. The Scoliae | 822 |
| Chapter III. A Dangerous Diet | 1639 |
| Chapter IV. The Cetonia Larva | 1820 |
| Chapter V. The Problem of The Scoliae | 788 |
| Chapter VII. Change of Diet | 1912 |
| Chapter VIII. A Dig at The Evolutionists | 2216 |
| Chapter IX. Rationing According to Sex | 1633 |
| Chapter X. The Bee Eating Philanthus | 687 |
| Chapter XI. The Method of The Ammophilae | 707 |
| Chapter XII. The Method of The Scoliae | 935 |
| Chapter III. The Method of The Calicurgi | 1214 |
| Chapter XIV. Objections and Rejoinders | 859 |
| Chapter III. Another Prober (Perforator) | 1031 |
| Chapter XI. The Eumenes | 1100 |