| Chapter I. The Harmas | 8614 |
| Chapter II. The Anthrax | 5566 |
| Chapter III. Another Prober (Perforator) | 6090 |
| Chapter IV. Larval Dimorphism | 6275 |
| Chapter V. Heredity | 5080 |
| Chapter VI. My Schooling | 3449 |
| Chapter VII. The Pond | 5388 |
| Chapter VIII. The Caddis Worm | 6990 |
| Chapter IX. The Greenbottles | 5908 |
| Chapter X. The Gray Flesh Flies | 14387 |
| Chapter XI. The Bumblebee Fly | 5161 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 25523 |
| Chapter XIII. Mathematical Memories: My Little Table | 4393 |
| Chapter XIV. The Bluebottle: The Laying | 6223 |
| Chapter XV. The Bluebottle: The Grub | 6600 |
| Chapter XVI. A Parasite of The Maggot | 6546 |
| Chapter XVII. Recollections of Childhood | 5872 |
| Chapter XVIII. Insects and Mushrooms | 11320 |
| Chapter XIX. A Memorable Lesson | 8332 |
| Chapter XX. Industrial Chemistry | 5925 |
