| Chapter VI. Instinct And Discernment | 7802 |
| Chapter VII. Economy of Energy | 5665 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 11104 |
| Chapter III. The Pine Processionary: The Procession | 11391 |
| Chapter IV. The Pine Processionary: Meteoroogy | 6739 |
| Chapter VIII. The Pine Processionary | 5299 |
| Chapter XIV. The Cabbage Caterpillar | 9633 |
