| Chapter VI. Instinct And Discernment | 8749 |
| Chapter VII. Economy of Energy | 6543 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 12641 |
| Chapter III. The Pine Processionary: The Procession | 14143 |
| Chapter IV. The Pine Processionary: Meteoroogy | 7913 |
| Chapter VIII. The Pine Processionary | 6230 |
| Chapter XIV. The Cabbage Caterpillar | 10547 |
