| Chapter I. The Harmas | 6963 |
| Chapter II. The Anthrax | 4645 |
| Chapter III. Another Prober (Perforator) | 5066 |
| Chapter IV. Larval Dimorphism | 5163 |
| Chapter V. Heredity | 3993 |
| Chapter VII. The Pond | 4327 |
| Chapter VIII. The Caddis Worm | 5937 |
| Chapter IX. The Greenbottles | 4827 |
| Chapter X. The Gray Flesh Flies | 13058 |
| Chapter XI. The Bumblebee Fly | 4135 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 13991 |
| Chapter XIII. Mathematical Memories: My Little Table | 3378 |
| Chapter XIV. The Bluebottle: The Laying | 5291 |
| Chapter XV. The Bluebottle: The Grub | 5462 |
| Chapter XVI. A Parasite of The Maggot | 5487 |
| Chapter XVII. Recollections of Childhood | 4807 |
| Chapter XVIII. Insects and Mushrooms | 9969 |
| Chapter XX. Industrial Chemistry | 4857 |
