| Chapter I. The Harmas | 1392 |
| Chapter II. The Anthrax | 599 |
| Chapter III. Another Prober (Perforator) | 1031 |
| Chapter IV. Larval Dimorphism | 613 |
| Chapter V. Heredity | 749 |
| Chapter VI. My Schooling | 476 |
| Chapter VII. The Pond | 959 |
| Chapter VIII. The Caddis Worm | 864 |
| Chapter IX. The Greenbottles | 952 |
| Chapter X. The Gray Flesh Flies | 3354 |
| Chapter XI. The Bumblebee Fly | 853 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 2665 |
| Chapter XIII. Mathematical Memories: My Little Table | 780 |
| Chapter XIV. The Bluebottle: The Laying | 1212 |
| Chapter XV. The Bluebottle: The Grub | 1674 |
| Chapter XVI. A Parasite of The Maggot | 1205 |
| Chapter XVII. Recollections of Childhood | 824 |
| Chapter XVIII. Insects and Mushrooms | 2365 |
| Chapter XIX. A Memorable Lesson | 1445 |
| Chapter XX. Industrial Chemistry | 1006 |
