| Chapter I. Bramble-Dwellers | 8576 |
| Chapter II. Experiments | 6736 |
| Chapter IV. More Enquiries Into Mason Bees | 8532 |
| Chapter V. The Story of My Cats | 6589 |
| Chapter VI. The Red Ants | 9895 |
| Chapter IX. The Theory of Parasitism | 7027 |
| Chapter VII. The Arbutus Caterpillar | 8983 |
| Chapter VIII. An Insect Virus | 7853 |
| Chapter XIX. A Memorable Lesson | 8891 |
| Chapter XX. Industrial Chemistry | 6534 |
| Chapter VI. The Burying Beetles: Experiments | 5706 |
| Making a Bug Home | 14380 |
