| Chapter I. The Harmas | 10051 |
| Chapter II. The Anthrax | 6501 |
| Chapter III. Another Prober (Perforator) | 6957 |
| Chapter IV. Larval Dimorphism | 7046 |
| Chapter V. Heredity | 5875 |
| Chapter VII. The Pond | 6153 |
| Chapter VIII. The Caddis Worm | 7816 |
| Chapter IX. The Greenbottles | 6677 |
| Chapter X. The Gray Flesh Flies | 15402 |
| Chapter XI. The Bumblebee Fly | 5920 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 33673 |
| Chapter XIII. Mathematical Memories: My Little Table | 5131 |
| Chapter XIV. The Bluebottle: The Laying | 6929 |
| Chapter XV. The Bluebottle: The Grub | 7384 |
| Chapter XVI. A Parasite of The Maggot | 7329 |
| Chapter XVII. Recollections of Childhood | 6628 |
| Chapter XVIII. Insects and Mushrooms | 12436 |
| Chapter XX. Industrial Chemistry | 6681 |
