| Chapter I. The Harmas | 7247 |
| Chapter II. The Anthrax | 4668 |
| Chapter III. Another Prober (Perforator) | 5249 |
| Chapter IV. Larval Dimorphism | 5389 |
| Chapter V. Heredity | 4194 |
| Chapter VI. My Schooling | 2689 |
| Chapter VII. The Pond | 4511 |
| Chapter VIII. The Caddis Worm | 6132 |
| Chapter IX. The Greenbottles | 5012 |
| Chapter X. The Gray Flesh Flies | 13269 |
| Chapter XI. The Bumblebee Fly | 4342 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 14800 |
| Chapter XIII. Mathematical Memories: My Little Table | 3573 |
| Chapter XIV. The Bluebottle: The Laying | 5477 |
| Chapter XV. The Bluebottle: The Grub | 5680 |
| Chapter XVI. A Parasite of The Maggot | 5691 |
| Chapter XVII. Recollections of Childhood | 5010 |
| Chapter XVIII. Insects and Mushrooms | 10181 |
| Chapter XIX. A Memorable Lesson | 7517 |
| Chapter XX. Industrial Chemistry | 5062 |
