| Chapter VI. Instinct And Discernment | 9579 |
| Chapter VII. Economy of Energy | 7245 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 14204 |
| Chapter III. The Pine Processionary: The Procession | 16399 |
| Chapter IV. The Pine Processionary: Meteoroogy | 8938 |
| Chapter VIII. The Pine Processionary | 6868 |
| Chapter XIV. The Cabbage Caterpillar | 11186 |
