| Chapter VI. Instinct And Discernment | 50 |
| Chapter VII. Economy of Energy | 56 |
| Chapter I. The Pine Processionary: The Eggs And The Hatching | 172 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 46 |
| Chapter III. The Pine Processionary: The Procession | 59 |
| Chapter IV. The Pine Processionary: Meteoroogy | 48 |
| Chapter V. The Pine Processionary: The Moth | 54 |
| Chapter VI. The PIne Processionary: The stinging Power | 52 |
| Chapter VII. The Arbutus Caterpillar | 61 |
| Chapter VIII. An Insect Virus | 59 |
| Chapter IX. The Psyches: The Laying | 61 |
| Chapter X. The Psyches: The Cases | 41 |
| Chapter XI. The Great Peacock | 47 |
| Chapter XII. The Banded Monk | 48 |
| Chapter XIII. The Sense of Smell | 48 |
| Chapter XIV. The Cabbage Caterpillar | 46 |
| Chapter VIII. The Pine Processionary | 53 |
| Chapter XIV. The Cabbage Caterpillar | 68 |