| Chapter VI. Instinct And Discernment | 7556 |
| Chapter VII. Economy of Energy | 5458 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 10879 |
| Chapter III. The Pine Processionary: The Procession | 10882 |
| Chapter IV. The Pine Processionary: Meteoroogy | 6425 |
| Chapter VIII. The Pine Processionary | 5094 |
| Chapter XIV. The Cabbage Caterpillar | 9448 |
