| Chapter I. The Harmas | 10451 |
| Chapter II. The Anthrax | 6812 |
| Chapter III. Another Prober (Perforator) | 7237 |
| Chapter IV. Larval Dimorphism | 7276 |
| Chapter V. Heredity | 6093 |
| Chapter VI. My Schooling | 4271 |
| Chapter VII. The Pond | 6519 |
| Chapter VIII. The Caddis Worm | 8046 |
| Chapter IX. The Greenbottles | 6997 |
| Chapter X. The Gray Flesh Flies | 15771 |
| Chapter XI. The Bumblebee Fly | 6134 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 34656 |
| Chapter XIII. Mathematical Memories: My Little Table | 5343 |
| Chapter XIV. The Bluebottle: The Laying | 7123 |
| Chapter XV. The Bluebottle: The Grub | 7649 |
| Chapter XVI. A Parasite of The Maggot | 7567 |
| Chapter XVII. Recollections of Childhood | 6867 |
| Chapter XVIII. Insects and Mushrooms | 12849 |
| Chapter XIX. A Memorable Lesson | 9221 |
| Chapter XX. Industrial Chemistry | 6893 |
