| Chapter I. The Harmas | 2375 |
| Chapter IV. The Mother Decides the sex of the egg | 1451 |
| Chapter XII. The Halicti: a Parasite | 1444 |
| Chapter II. The Anthrax | 1119 |
| Chapter III. Another Prober (Perforator) | 1696 |
| Chapter IV. Larval Dimorphism | 1110 |
| Chapter V. Heredity | 1228 |
| Chapter VII. The Pond | 1436 |
| Chapter VIII. The Caddis Worm | 2170 |
| Chapter IX. The Greenbottles | 1554 |
| Chapter X. The Gray Flesh Flies | 7455 |
| Chapter XI. The Bumblebee Fly | 1390 |
| Chapter XII. Mathematical Memories: Newton's Binomial Theorem | 4178 |
| Chapter XIII. Mathematical Memories: My Little Table | 1199 |
| Chapter XIV. The Bluebottle: The Laying | 2229 |
| Chapter XV. The Bluebottle: The Grub | 2439 |
| Chapter XVI. A Parasite of The Maggot | 1903 |
| Chapter XVII. Recollections of Childhood | 1376 |
| Chapter XVIII. Insects and Mushrooms | 4066 |
| Chapter XX. Industrial Chemistry | 1433 |
| Chapter VII. The Bluebottle | 3559 |