| Chapter I. The Harmas | 67 |
| Letter from Charles Darwin to J.-H. Fabre of January 31, 1880 | 51 |
| Chapter IV. The Mother Decides the sex of the egg | 54 |
| Chapter XII. The Halicti: a Parasite | 48 |
| Chapter II. The Anthrax | 48 |
| Chapter III. Another Prober (Perforator) | 46 |
| Chapter IV. Larval Dimorphism | 43 |
| Chapter V. Heredity | 41 |
| Chapter VII. The Pond | 51 |
| Chapter VIII. The Caddis Worm | 45 |
| Chapter IX. The Greenbottles | 47 |
| Chapter X. The Gray Flesh Flies | 46 |
| Chapter XI. The Bumblebee Fly | 45 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 60 |
| Chapter XIII. Mathematical Memories: My Little Table | 59 |
| Chapter XIV. The Bluebottle: The Laying | 57 |
| Chapter XV. The Bluebottle: The Grub | 57 |
| Chapter XVI. A Parasite of The Maggot | 54 |
| Chapter XVII. Recollections of Childhood | 47 |
| Chapter XVIII. Insects and Mushrooms | 49 |
| Chapter XX. Industrial Chemistry | 54 |
| Chapter VII. The Bluebottle | 173 |