| Chapter VI. Instinct And Discernment | 9952 |
| Chapter VII. Economy of Energy | 7540 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 14880 |
| Chapter III. The Pine Processionary: The Procession | 17208 |
| Chapter IV. The Pine Processionary: Meteoroogy | 9291 |
| Chapter VIII. The Pine Processionary | 7139 |
| Chapter XIV. The Cabbage Caterpillar | 11499 |
