| Chapter I. The Harmas | 8597 |
| Chapter I. Bramble-Dwellers | 7706 |
| Chapter IV. The Mother Decides the sex of the egg | 5347 |
| Chapter XI. The Poison of The Bee | 7895 |
| Chapter XII. The Halicti: a Parasite | 5468 |
| Chapter VI. The Red Ants | 8709 |
| Chapter VIII. Parasites | 5476 |
| Chapter IX. The Theory of Parasitism | 6351 |
| Chapter X. The Tribulations of The Mason Bee | 7098 |
| Chapter I. The Pompili | 13007 |
| Chapter II. The Scoliae | 5314 |
| Chapter III. A Dangerous Diet | 8281 |
| Chapter IV. The Cetonia Larva | 21515 |
| Chapter V. The Problem of The Scoliae | 4594 |
| Chapter VII. Change of Diet | 13502 |
| Chapter VIII. A Dig at The Evolutionists | 8921 |
| Chapter IX. Rationing According to Sex | 7740 |
| Chapter X. The Bee Eating Philanthus | 7647 |
| Chapter XI. The Method of The Ammophilae | 4693 |
| Chapter XII. The Method of The Scoliae | 8316 |
| Chapter III. The Method of The Calicurgi | 7979 |
| Chapter XIV. Objections and Rejoinders | 5209 |
| Chapter III. Another Prober (Perforator) | 6081 |
| Chapter XI. The Eumenes | 7773 |
