| Chapter I. The Harmas | 298 |
| Chapter II. The Anthrax | 205 |
| Chapter III. Another Prober (Perforator) | 237 |
| Chapter IV. Larval Dimorphism | 200 |
| Chapter V. Heredity | 224 |
| Chapter VII. The Pond | 269 |
| Chapter VIII. The Caddis Worm | 245 |
| Chapter IX. The Greenbottles | 228 |
| Chapter X. The Gray Flesh Flies | 288 |
| Chapter XI. The Bumblebee Fly | 229 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 427 |
| Chapter XIII. Mathematical Memories: My Little Table | 314 |
| Chapter XIV. The Bluebottle: The Laying | 250 |
| Chapter XV. The Bluebottle: The Grub | 310 |
| Chapter XVI. A Parasite of The Maggot | 318 |
| Chapter XVII. Recollections of Childhood | 223 |
| Chapter XVIII. Insects and Mushrooms | 347 |
| Chapter XX. Industrial Chemistry | 272 |