| Chapter I. Bramble-Dwellers | 6119 |
| Chapter II. Experiments | 4536 |
| Chapter IV. More Enquiries Into Mason Bees | 6519 |
| Chapter V. The Story of My Cats | 4744 |
| Chapter VI. The Red Ants | 6409 |
| Chapter IX. The Theory of Parasitism | 5262 |
| Chapter VII. The Arbutus Caterpillar | 6946 |
| Chapter VIII. An Insect Virus | 5709 |
| Chapter XIX. A Memorable Lesson | 7303 |
| Chapter XX. Industrial Chemistry | 4820 |
| Chapter VI. The Burying Beetles: Experiments | 3916 |
| Making a Bug Home | 11724 |
