| Chapter I. The Harmas | 10718 |
| Chapter I. Bramble-Dwellers | 9293 |
| Chapter IV. The Mother Decides the sex of the egg | 6726 |
| Chapter XI. The Poison of The Bee | 9350 |
| Chapter XII. The Halicti: a Parasite | 6773 |
| Chapter VI. The Red Ants | 11322 |
| Chapter VIII. Parasites | 6876 |
| Chapter IX. The Theory of Parasitism | 7519 |
| Chapter X. The Tribulations of The Mason Bee | 8482 |
| Chapter I. The Pompili | 14401 |
| Chapter II. The Scoliae | 6570 |
| Chapter III. A Dangerous Diet | 9581 |
| Chapter IV. The Cetonia Larva | 23384 |
| Chapter V. The Problem of The Scoliae | 5637 |
| Chapter VII. Change of Diet | 14939 |
| Chapter VIII. A Dig at The Evolutionists | 10026 |
| Chapter IX. Rationing According to Sex | 9038 |
| Chapter X. The Bee Eating Philanthus | 8745 |
| Chapter XI. The Method of The Ammophilae | 6088 |
| Chapter XII. The Method of The Scoliae | 9800 |
| Chapter III. The Method of The Calicurgi | 9363 |
| Chapter XIV. Objections and Rejoinders | 6440 |
| Chapter III. Another Prober (Perforator) | 7337 |
| Chapter XI. The Eumenes | 9468 |