| Chapter I. The Harmas | 8757 |
| Chapter II. The Anthrax | 5662 |
| Chapter III. Another Prober (Perforator) | 6196 |
| Chapter IV. Larval Dimorphism | 6411 |
| Chapter V. Heredity | 5184 |
| Chapter VI. My Schooling | 3535 |
| Chapter VII. The Pond | 5490 |
| Chapter VIII. The Caddis Worm | 7116 |
| Chapter IX. The Greenbottles | 5988 |
| Chapter X. The Gray Flesh Flies | 14493 |
| Chapter XI. The Bumblebee Fly | 5268 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 30829 |
| Chapter XIII. Mathematical Memories: My Little Table | 4485 |
| Chapter XIV. The Bluebottle: The Laying | 6311 |
| Chapter XV. The Bluebottle: The Grub | 6700 |
| Chapter XVI. A Parasite of The Maggot | 6637 |
| Chapter XVII. Recollections of Childhood | 5970 |
| Chapter XVIII. Insects and Mushrooms | 11413 |
| Chapter XIX. A Memorable Lesson | 8431 |
| Chapter XX. Industrial Chemistry | 6019 |
