| Chapter I. The Harmas | 7748 |
| Chapter II. The Anthrax | 4969 |
| Chapter III. Another Prober (Perforator) | 5503 |
| Chapter IV. Larval Dimorphism | 5687 |
| Chapter V. Heredity | 4493 |
| Chapter VI. My Schooling | 2947 |
| Chapter VII. The Pond | 4811 |
| Chapter VIII. The Caddis Worm | 6440 |
| Chapter IX. The Greenbottles | 5293 |
| Chapter X. The Gray Flesh Flies | 13604 |
| Chapter XI. The Bumblebee Fly | 4608 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 15853 |
| Chapter XIII. Mathematical Memories: My Little Table | 3845 |
| Chapter XIV. The Bluebottle: The Laying | 5741 |
| Chapter XV. The Bluebottle: The Grub | 5967 |
| Chapter XVI. A Parasite of The Maggot | 5986 |
| Chapter XVII. Recollections of Childhood | 5286 |
| Chapter XVIII. Insects and Mushrooms | 10505 |
| Chapter XIX. A Memorable Lesson | 7803 |
| Chapter XX. Industrial Chemistry | 5343 |
