| Chapter I. The Harmas | 1039 |
| Chapter IV. The Mother Decides the sex of the egg | 743 |
| Chapter XII. The Halicti: a Parasite | 715 |
| Chapter II. The Anthrax | 452 |
| Chapter III. Another Prober (Perforator) | 776 |
| Chapter IV. Larval Dimorphism | 467 |
| Chapter V. Heredity | 590 |
| Chapter VII. The Pond | 753 |
| Chapter VIII. The Caddis Worm | 618 |
| Chapter IX. The Greenbottles | 713 |
| Chapter X. The Gray Flesh Flies | 1797 |
| Chapter XI. The Bumblebee Fly | 618 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 1939 |
| Chapter XIII. Mathematical Memories: My Little Table | 661 |
| Chapter XIV. The Bluebottle: The Laying | 961 |
| Chapter XV. The Bluebottle: The Grub | 1273 |
| Chapter XVI. A Parasite of The Maggot | 935 |
| Chapter XVII. Recollections of Childhood | 625 |
| Chapter XVIII. Insects and Mushrooms | 1680 |
| Chapter XX. Industrial Chemistry | 857 |
| Chapter VII. The Bluebottle | 1640 |