| Chapter I. Bramble-Dwellers | 8719 |
| Chapter II. Experiments | 6911 |
| Chapter IV. More Enquiries Into Mason Bees | 8806 |
| Chapter V. The Story of My Cats | 6723 |
| Chapter VI. The Red Ants | 10091 |
| Chapter IX. The Theory of Parasitism | 7145 |
| Chapter VII. The Arbutus Caterpillar | 9125 |
| Chapter VIII. An Insect Virus | 7995 |
| Chapter XIX. A Memorable Lesson | 9007 |
| Chapter XX. Industrial Chemistry | 6670 |
| Chapter VI. The Burying Beetles: Experiments | 5937 |
| Making a Bug Home | 14523 |
