| Chapter VI. Instinct And Discernment | 8854 |
| Chapter VII. Economy of Energy | 6634 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 12794 |
| Chapter III. The Pine Processionary: The Procession | 14435 |
| Chapter IV. The Pine Processionary: Meteoroogy | 8085 |
| Chapter VIII. The Pine Processionary | 6316 |
| Chapter XIV. The Cabbage Caterpillar | 10629 |
