| Chapter I. The Harmas | 134 |
| Chapter II. The Anthrax | 101 |
| Chapter III. Another Prober (Perforator) | 108 |
| Chapter IV. Larval Dimorphism | 95 |
| Chapter V. Heredity | 106 |
| Chapter VI. My Schooling | 79 |
| Chapter VII. The Pond | 113 |
| Chapter VIII. The Caddis Worm | 109 |
| Chapter IX. The Greenbottles | 104 |
| Chapter X. The Gray Flesh Flies | 110 |
| Chapter XI. The Bumblebee Fly | 95 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 134 |
| Chapter XIII. Mathematical Memories: My Little Table | 165 |
| Chapter XIV. The Bluebottle: The Laying | 124 |
| Chapter XV. The Bluebottle: The Grub | 139 |
| Chapter XVI. A Parasite of The Maggot | 137 |
| Chapter XVII. Recollections of Childhood | 103 |
| Chapter XVIII. Insects and Mushrooms | 144 |
| Chapter XIX. A Memorable Lesson | 123 |
| Chapter XX. Industrial Chemistry | 124 |