| Chapter I. Bramble-Dwellers | 7333 |
| Chapter II. Experiments | 5541 |
| Chapter IV. More Enquiries Into Mason Bees | 7428 |
| Chapter V. The Story of My Cats | 5621 |
| Chapter VI. The Red Ants | 8124 |
| Chapter IX. The Theory of Parasitism | 6074 |
| Chapter VII. The Arbutus Caterpillar | 7862 |
| Chapter VIII. An Insect Virus | 6656 |
| Chapter XIX. A Memorable Lesson | 8078 |
| Chapter XX. Industrial Chemistry | 5643 |
| Chapter VI. The Burying Beetles: Experiments | 4717 |
| Making a Bug Home | 13050 |
