| Chapter I. Bramble-Dwellers | 778 |
| Chapter II. Experiments | 878 |
| Chapter IV. More Enquiries Into Mason Bees | 1032 |
| Chapter V. The Story of My Cats | 914 |
| Chapter VI. The Red Ants | 776 |
| Chapter IX. The Theory of Parasitism | 646 |
| Chapter VII. The Arbutus Caterpillar | 1031 |
| Chapter VIII. An Insect Virus | 841 |
| Chapter XIX. A Memorable Lesson | 1009 |
| Chapter XX. Industrial Chemistry | 859 |
| Chapter VI. The Burying Beetles: Experiments | 622 |
| Making a Bug Home | 1211 |
