| Chapter I. The Harmas | 2375 |
| Chapter I. Bramble-Dwellers | 1815 |
| Chapter IV. The Mother Decides the sex of the egg | 1451 |
| Chapter XI. The Poison of The Bee | 2763 |
| Chapter XII. The Halicti: a Parasite | 1444 |
| Chapter VI. The Red Ants | 1539 |
| Chapter VIII. Parasites | 1217 |
| Chapter IX. The Theory of Parasitism | 1317 |
| Chapter X. The Tribulations of The Mason Bee | 1972 |
| Chapter I. The Pompili | 7106 |
| Chapter II. The Scoliae | 1365 |
| Chapter III. A Dangerous Diet | 2290 |
| Chapter IV. The Cetonia Larva | 4163 |
| Chapter V. The Problem of The Scoliae | 1188 |
| Chapter VII. Change of Diet | 4274 |
| Chapter VIII. A Dig at The Evolutionists | 4005 |
| Chapter IX. Rationing According to Sex | 2677 |
| Chapter X. The Bee Eating Philanthus | 2321 |
| Chapter XI. The Method of The Ammophilae | 1194 |
| Chapter XII. The Method of The Scoliae | 1654 |
| Chapter III. The Method of The Calicurgi | 1826 |
| Chapter XIV. Objections and Rejoinders | 1319 |
| Chapter III. Another Prober (Perforator) | 1696 |
| Chapter XI. The Eumenes | 1980 |