| Chapter I. The Harmas | 7067 |
| Chapter II. The Anthrax | 4538 |
| Chapter III. Another Prober (Perforator) | 5117 |
| Chapter IV. Larval Dimorphism | 5252 |
| Chapter V. Heredity | 4065 |
| Chapter VI. My Schooling | 2591 |
| Chapter VII. The Pond | 4397 |
| Chapter VIII. The Caddis Worm | 6006 |
| Chapter IX. The Greenbottles | 4895 |
| Chapter X. The Gray Flesh Flies | 13127 |
| Chapter XI. The Bumblebee Fly | 4217 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 14447 |
| Chapter XIII. Mathematical Memories: My Little Table | 3446 |
| Chapter XIV. The Bluebottle: The Laying | 5355 |
| Chapter XV. The Bluebottle: The Grub | 5539 |
| Chapter XVI. A Parasite of The Maggot | 5566 |
| Chapter XVII. Recollections of Childhood | 4870 |
| Chapter XVIII. Insects and Mushrooms | 10044 |
| Chapter XIX. A Memorable Lesson | 7401 |
| Chapter XX. Industrial Chemistry | 4930 |
