| Chapter I. The Harmas | 7159 |
| Chapter II. The Anthrax | 4822 |
| Chapter III. Another Prober (Perforator) | 5193 |
| Chapter IV. Larval Dimorphism | 5341 |
| Chapter V. Heredity | 4121 |
| Chapter VI. My Schooling | 2642 |
| Chapter VII. The Pond | 4462 |
| Chapter VIII. The Caddis Worm | 6093 |
| Chapter IX. The Greenbottles | 4999 |
| Chapter X. The Gray Flesh Flies | 13235 |
| Chapter XI. The Bumblebee Fly | 4286 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 14408 |
| Chapter XIII. Mathematical Memories: My Little Table | 3514 |
| Chapter XIV. The Bluebottle: The Laying | 5432 |
| Chapter XV. The Bluebottle: The Grub | 5595 |
| Chapter XVI. A Parasite of The Maggot | 5634 |
| Chapter XVII. Recollections of Childhood | 4956 |
| Chapter XVIII. Insects and Mushrooms | 10195 |
| Chapter XIX. A Memorable Lesson | 7481 |
| Chapter XX. Industrial Chemistry | 5002 |
