| Chapter VI. Instinct And Discernment | 7628 |
| Chapter VII. Economy of Energy | 5508 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 10909 |
| Chapter III. The Pine Processionary: The Procession | 10934 |
| Chapter IV. The Pine Processionary: Meteoroogy | 6519 |
| Chapter VIII. The Pine Processionary | 5126 |
| Chapter XIV. The Cabbage Caterpillar | 9481 |
