| Chapter VI. Instinct And Discernment | 8140 |
| Chapter VII. Economy of Energy | 5977 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 11674 |
| Chapter III. The Pine Processionary: The Procession | 12487 |
| Chapter IV. The Pine Processionary: Meteoroogy | 7135 |
| Chapter VIII. The Pine Processionary | 5645 |
| Chapter XIV. The Cabbage Caterpillar | 9981 |
