| Chapter I. Bramble-Dwellers | 8737 |
| Chapter II. Experiments | 6932 |
| Chapter IV. More Enquiries Into Mason Bees | 8817 |
| Chapter V. The Story of My Cats | 6738 |
| Chapter VI. The Red Ants | 10115 |
| Chapter IX. The Theory of Parasitism | 7159 |
| Chapter VII. The Arbutus Caterpillar | 9141 |
| Chapter VIII. An Insect Virus | 8010 |
| Chapter XIX. A Memorable Lesson | 9015 |
| Chapter XX. Industrial Chemistry | 6680 |
| Chapter VI. The Burying Beetles: Experiments | 5954 |
| Making a Bug Home | 14540 |
