| Chapter I. The Harmas | 9988 |
| Chapter II. The Anthrax | 6469 |
| Chapter III. Another Prober (Perforator) | 6932 |
| Chapter IV. Larval Dimorphism | 7025 |
| Chapter V. Heredity | 5847 |
| Chapter VI. My Schooling | 4117 |
| Chapter VII. The Pond | 6131 |
| Chapter VIII. The Caddis Worm | 7786 |
| Chapter IX. The Greenbottles | 6655 |
| Chapter X. The Gray Flesh Flies | 15370 |
| Chapter XI. The Bumblebee Fly | 5897 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 33516 |
| Chapter XIII. Mathematical Memories: My Little Table | 5109 |
| Chapter XIV. The Bluebottle: The Laying | 6911 |
| Chapter XV. The Bluebottle: The Grub | 7359 |
| Chapter XVI. A Parasite of The Maggot | 7304 |
| Chapter XVII. Recollections of Childhood | 6604 |
| Chapter XVIII. Insects and Mushrooms | 12395 |
| Chapter XIX. A Memorable Lesson | 8995 |
| Chapter XX. Industrial Chemistry | 6656 |
