| Chapter I. Bramble-Dwellers | 8768 |
| Chapter II. Experiments | 6957 |
| Chapter IV. More Enquiries Into Mason Bees | 8841 |
| Chapter V. The Story of My Cats | 6759 |
| Chapter VI. The Red Ants | 10148 |
| Chapter IX. The Theory of Parasitism | 7178 |
| Chapter VII. The Arbutus Caterpillar | 9167 |
| Chapter VIII. An Insect Virus | 8053 |
| Chapter XIX. A Memorable Lesson | 9031 |
| Chapter XX. Industrial Chemistry | 6700 |
| Chapter VI. The Burying Beetles: Experiments | 5972 |
| Making a Bug Home | 14572 |
