| Chapter I. The Harmas | 10718 |
| Chapter IV. The Mother Decides the sex of the egg | 6726 |
| Chapter XII. The Halicti: a Parasite | 6773 |
| Chapter II. The Anthrax | 6979 |
| Chapter III. Another Prober (Perforator) | 7337 |
| Chapter IV. Larval Dimorphism | 7389 |
| Chapter V. Heredity | 6253 |
| Chapter VII. The Pond | 6660 |
| Chapter VIII. The Caddis Worm | 8171 |
| Chapter IX. The Greenbottles | 7157 |
| Chapter X. The Gray Flesh Flies | 15966 |
| Chapter XI. The Bumblebee Fly | 6219 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 35017 |
| Chapter XIII. Mathematical Memories: My Little Table | 5422 |
| Chapter XIV. The Bluebottle: The Laying | 7219 |
| Chapter XV. The Bluebottle: The Grub | 7752 |
| Chapter XVI. A Parasite of The Maggot | 7649 |
| Chapter XVII. Recollections of Childhood | 6984 |
| Chapter XVIII. Insects and Mushrooms | 13090 |
| Chapter XX. Industrial Chemistry | 6989 |
| Chapter VII. The Bluebottle | 9977 |