| Chapter I. The Harmas | 7437 |
| Chapter II. The Anthrax | 4781 |
| Chapter III. Another Prober (Perforator) | 5347 |
| Chapter IV. Larval Dimorphism | 5505 |
| Chapter V. Heredity | 4304 |
| Chapter VI. My Schooling | 2788 |
| Chapter VII. The Pond | 4621 |
| Chapter VIII. The Caddis Worm | 6240 |
| Chapter IX. The Greenbottles | 5118 |
| Chapter X. The Gray Flesh Flies | 13401 |
| Chapter XI. The Bumblebee Fly | 4449 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 15087 |
| Chapter XIII. Mathematical Memories: My Little Table | 3677 |
| Chapter XIV. The Bluebottle: The Laying | 5568 |
| Chapter XV. The Bluebottle: The Grub | 5786 |
| Chapter XVI. A Parasite of The Maggot | 5810 |
| Chapter XVII. Recollections of Childhood | 5113 |
| Chapter XVIII. Insects and Mushrooms | 10298 |
| Chapter XIX. A Memorable Lesson | 7619 |
| Chapter XX. Industrial Chemistry | 5164 |
