| Chapter I. The Harmas | 10599 |
| Chapter I. Bramble-Dwellers | 9245 |
| Chapter IV. The Mother Decides the sex of the egg | 6681 |
| Chapter XI. The Poison of The Bee | 9299 |
| Chapter XII. The Halicti: a Parasite | 6738 |
| Chapter VI. The Red Ants | 11177 |
| Chapter VIII. Parasites | 6806 |
| Chapter IX. The Theory of Parasitism | 7481 |
| Chapter X. The Tribulations of The Mason Bee | 8441 |
| Chapter I. The Pompili | 14355 |
| Chapter II. The Scoliae | 6525 |
| Chapter III. A Dangerous Diet | 9532 |
| Chapter IV. The Cetonia Larva | 23321 |
| Chapter V. The Problem of The Scoliae | 5605 |
| Chapter VII. Change of Diet | 14853 |
| Chapter VIII. A Dig at The Evolutionists | 9983 |
| Chapter IX. Rationing According to Sex | 8957 |
| Chapter X. The Bee Eating Philanthus | 8706 |
| Chapter XI. The Method of The Ammophilae | 6022 |
| Chapter XII. The Method of The Scoliae | 9772 |
| Chapter III. The Method of The Calicurgi | 9332 |
| Chapter XIV. Objections and Rejoinders | 6407 |
| Chapter III. Another Prober (Perforator) | 7303 |
| Chapter XI. The Eumenes | 9399 |