| Chapter I. The Harmas | 7603 |
| Chapter II. The Anthrax | 4876 |
| Chapter III. Another Prober (Perforator) | 5419 |
| Chapter IV. Larval Dimorphism | 5588 |
| Chapter V. Heredity | 4403 |
| Chapter VI. My Schooling | 2860 |
| Chapter VII. The Pond | 4727 |
| Chapter VIII. The Caddis Worm | 6331 |
| Chapter IX. The Greenbottles | 5202 |
| Chapter X. The Gray Flesh Flies | 13507 |
| Chapter XI. The Bumblebee Fly | 4526 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 15433 |
| Chapter XIII. Mathematical Memories: My Little Table | 3765 |
| Chapter XIV. The Bluebottle: The Laying | 5644 |
| Chapter XV. The Bluebottle: The Grub | 5872 |
| Chapter XVI. A Parasite of The Maggot | 5907 |
| Chapter XVII. Recollections of Childhood | 5201 |
| Chapter XVIII. Insects and Mushrooms | 10396 |
| Chapter XIX. A Memorable Lesson | 7721 |
| Chapter XX. Industrial Chemistry | 5248 |
