| Chapter VI. Instinct And Discernment | 6984 |
| Chapter VII. Economy of Energy | 4953 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 10197 |
| Chapter III. The Pine Processionary: The Procession | 8818 |
| Chapter IV. The Pine Processionary: Meteoroogy | 5947 |
| Chapter VIII. The Pine Processionary | 4240 |
| Chapter XIV. The Cabbage Caterpillar | 8831 |
