| Chapter I. The Harmas | 8469 |
| Chapter II. The Anthrax | 5477 |
| Chapter III. Another Prober (Perforator) | 6004 |
| Chapter IV. Larval Dimorphism | 6191 |
| Chapter V. Heredity | 4996 |
| Chapter VI. My Schooling | 3378 |
| Chapter VII. The Pond | 5306 |
| Chapter VIII. The Caddis Worm | 6899 |
| Chapter IX. The Greenbottles | 5788 |
| Chapter X. The Gray Flesh Flies | 14258 |
| Chapter XI. The Bumblebee Fly | 5067 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 23526 |
| Chapter XIII. Mathematical Memories: My Little Table | 4305 |
| Chapter XIV. The Bluebottle: The Laying | 6145 |
| Chapter XV. The Bluebottle: The Grub | 6502 |
| Chapter XVI. A Parasite of The Maggot | 6452 |
| Chapter XVII. Recollections of Childhood | 5782 |
| Chapter XVIII. Insects and Mushrooms | 11179 |
| Chapter XIX. A Memorable Lesson | 8250 |
| Chapter XX. Industrial Chemistry | 5828 |
