| Chapter I. The Harmas | 10546 |
| Chapter I. Bramble-Dwellers | 9206 |
| Chapter IV. The Mother Decides the sex of the egg | 6656 |
| Chapter XI. The Poison of The Bee | 9268 |
| Chapter XII. The Halicti: a Parasite | 6723 |
| Chapter VI. The Red Ants | 11091 |
| Chapter VIII. Parasites | 6769 |
| Chapter IX. The Theory of Parasitism | 7460 |
| Chapter X. The Tribulations of The Mason Bee | 8419 |
| Chapter I. The Pompili | 14326 |
| Chapter II. The Scoliae | 6501 |
| Chapter III. A Dangerous Diet | 9513 |
| Chapter IV. The Cetonia Larva | 23283 |
| Chapter V. The Problem of The Scoliae | 5581 |
| Chapter VII. Change of Diet | 14818 |
| Chapter VIII. A Dig at The Evolutionists | 9952 |
| Chapter IX. Rationing According to Sex | 8920 |
| Chapter X. The Bee Eating Philanthus | 8684 |
| Chapter XI. The Method of The Ammophilae | 5990 |
| Chapter XII. The Method of The Scoliae | 9745 |
| Chapter III. The Method of The Calicurgi | 9312 |
| Chapter XIV. Objections and Rejoinders | 6391 |
| Chapter III. Another Prober (Perforator) | 7282 |
| Chapter XI. The Eumenes | 9371 |