| Chapter I. The Harmas | 7655 |
| Chapter II. The Anthrax | 4906 |
| Chapter III. Another Prober (Perforator) | 5448 |
| Chapter IV. Larval Dimorphism | 5626 |
| Chapter V. Heredity | 4440 |
| Chapter VII. The Pond | 4757 |
| Chapter VIII. The Caddis Worm | 6378 |
| Chapter IX. The Greenbottles | 5233 |
| Chapter X. The Gray Flesh Flies | 13545 |
| Chapter XI. The Bumblebee Fly | 4560 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 15606 |
| Chapter XIII. Mathematical Memories: My Little Table | 3793 |
| Chapter XIV. The Bluebottle: The Laying | 5683 |
| Chapter XV. The Bluebottle: The Grub | 5912 |
| Chapter XVI. A Parasite of The Maggot | 5934 |
| Chapter XVII. Recollections of Childhood | 5236 |
| Chapter XVIII. Insects and Mushrooms | 10429 |
| Chapter XX. Industrial Chemistry | 5283 |
