| Chapter I. The Harmas | 8597 |
| Chapter II. The Anthrax | 5558 |
| Chapter III. Another Prober (Perforator) | 6081 |
| Chapter IV. Larval Dimorphism | 6265 |
| Chapter V. Heredity | 5070 |
| Chapter VI. My Schooling | 3442 |
| Chapter VII. The Pond | 5384 |
| Chapter VIII. The Caddis Worm | 6986 |
| Chapter IX. The Greenbottles | 5873 |
| Chapter X. The Gray Flesh Flies | 14369 |
| Chapter XI. The Bumblebee Fly | 5159 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 25623 |
| Chapter XIII. Mathematical Memories: My Little Table | 4381 |
| Chapter XIV. The Bluebottle: The Laying | 6218 |
| Chapter XV. The Bluebottle: The Grub | 6585 |
| Chapter XVI. A Parasite of The Maggot | 6529 |
| Chapter XVII. Recollections of Childhood | 5862 |
| Chapter XVIII. Insects and Mushrooms | 11285 |
| Chapter XIX. A Memorable Lesson | 8329 |
| Chapter XX. Industrial Chemistry | 5915 |
