| Chapter VI. Instinct And Discernment | 7928 |
| Chapter VII. Economy of Energy | 5787 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 11258 |
| Chapter III. The Pine Processionary: The Procession | 11792 |
| Chapter IV. The Pine Processionary: Meteoroogy | 6879 |
| Chapter VIII. The Pine Processionary | 5432 |
| Chapter XIV. The Cabbage Caterpillar | 9755 |
