| Chapter I. Bramble-Dwellers | 8895 |
| Chapter II. Experiments | 7100 |
| Chapter IV. More Enquiries Into Mason Bees | 8996 |
| Chapter V. The Story of My Cats | 6845 |
| Chapter VI. The Red Ants | 10565 |
| Chapter IX. The Theory of Parasitism | 7265 |
| Chapter VII. The Arbutus Caterpillar | 9259 |
| Chapter VIII. An Insect Virus | 8180 |
| Chapter XIX. A Memorable Lesson | 9101 |
| Chapter XX. Industrial Chemistry | 6783 |
| Chapter VI. The Burying Beetles: Experiments | 6179 |
| Making a Bug Home | 14669 |
