| Chapter I. Bramble-Dwellers | 775 |
| Chapter II. Experiments | 869 |
| Chapter IV. More Enquiries Into Mason Bees | 1028 |
| Chapter V. The Story of My Cats | 905 |
| Chapter VI. The Red Ants | 768 |
| Chapter IX. The Theory of Parasitism | 642 |
| Chapter VII. The Arbutus Caterpillar | 1026 |
| Chapter VIII. An Insect Virus | 838 |
| Chapter XIX. A Memorable Lesson | 1004 |
| Chapter XX. Industrial Chemistry | 854 |
| Chapter VI. The Burying Beetles: Experiments | 620 |
| Making a Bug Home | 1202 |
