| Chapter I. Bramble-Dwellers | 6313 |
| Chapter II. Experiments | 4727 |
| Chapter IV. More Enquiries Into Mason Bees | 6686 |
| Chapter V. The Story of My Cats | 4899 |
| Chapter VI. The Red Ants | 6616 |
| Chapter IX. The Theory of Parasitism | 5472 |
| Chapter VII. The Arbutus Caterpillar | 7128 |
| Chapter VIII. An Insect Virus | 5909 |
| Chapter XIX. A Memorable Lesson | 7453 |
| Chapter XX. Industrial Chemistry | 4967 |
| Chapter VI. The Burying Beetles: Experiments | 4066 |
| Making a Bug Home | 12114 |
