| Chapter I. The Harmas | 8950 |
| Chapter I. Bramble-Dwellers | 7984 |
| Chapter IV. The Mother Decides the sex of the egg | 5595 |
| Chapter XI. The Poison of The Bee | 8177 |
| Chapter XII. The Halicti: a Parasite | 5735 |
| Chapter VI. The Red Ants | 9086 |
| Chapter VIII. Parasites | 5689 |
| Chapter IX. The Theory of Parasitism | 6583 |
| Chapter X. The Tribulations of The Mason Bee | 7352 |
| Chapter I. The Pompili | 13226 |
| Chapter II. The Scoliae | 5542 |
| Chapter III. A Dangerous Diet | 8508 |
| Chapter IV. The Cetonia Larva | 21771 |
| Chapter V. The Problem of The Scoliae | 4796 |
| Chapter VII. Change of Diet | 13722 |
| Chapter VIII. A Dig at The Evolutionists | 9131 |
| Chapter IX. Rationing According to Sex | 7998 |
| Chapter X. The Bee Eating Philanthus | 7843 |
| Chapter XI. The Method of The Ammophilae | 4920 |
| Chapter XII. The Method of The Scoliae | 8478 |
| Chapter III. The Method of The Calicurgi | 8221 |
| Chapter XIV. Objections and Rejoinders | 5469 |
| Chapter III. Another Prober (Perforator) | 6327 |
| Chapter XI. The Eumenes | 8066 |