| Chapter I. The Harmas | 7109 |
| Chapter II. The Anthrax | 4780 |
| Chapter III. Another Prober (Perforator) | 5161 |
| Chapter IV. Larval Dimorphism | 5301 |
| Chapter V. Heredity | 4094 |
| Chapter VI. My Schooling | 2616 |
| Chapter VII. The Pond | 4426 |
| Chapter VIII. The Caddis Worm | 6056 |
| Chapter IX. The Greenbottles | 4957 |
| Chapter X. The Gray Flesh Flies | 13195 |
| Chapter XI. The Bumblebee Fly | 4250 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 14309 |
| Chapter XIII. Mathematical Memories: My Little Table | 3488 |
| Chapter XIV. The Bluebottle: The Laying | 5396 |
| Chapter XV. The Bluebottle: The Grub | 5564 |
| Chapter XVI. A Parasite of The Maggot | 5604 |
| Chapter XVII. Recollections of Childhood | 4919 |
| Chapter XVIII. Insects and Mushrooms | 10141 |
| Chapter XIX. A Memorable Lesson | 7453 |
| Chapter XX. Industrial Chemistry | 4967 |
