| Chapter I. The Harmas | 8950 |
| Chapter IV. The Mother Decides the sex of the egg | 5595 |
| Chapter XII. The Halicti: a Parasite | 5735 |
| Chapter II. The Anthrax | 5784 |
| Chapter III. Another Prober (Perforator) | 6327 |
| Chapter IV. Larval Dimorphism | 6478 |
| Chapter V. Heredity | 5290 |
| Chapter VII. The Pond | 5592 |
| Chapter VIII. The Caddis Worm | 7199 |
| Chapter IX. The Greenbottles | 6137 |
| Chapter X. The Gray Flesh Flies | 14633 |
| Chapter XI. The Bumblebee Fly | 5359 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 29330 |
| Chapter XIII. Mathematical Memories: My Little Table | 4591 |
| Chapter XIV. The Bluebottle: The Laying | 6413 |
| Chapter XV. The Bluebottle: The Grub | 6819 |
| Chapter XVI. A Parasite of The Maggot | 6742 |
| Chapter XVII. Recollections of Childhood | 6064 |
| Chapter XVIII. Insects and Mushrooms | 11592 |
| Chapter XX. Industrial Chemistry | 6138 |
| Chapter VII. The Bluebottle | 9035 |