| Chapter VI. Instinct And Discernment | 9954 |
| Chapter VII. Economy of Energy | 7541 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 14886 |
| Chapter III. The Pine Processionary: The Procession | 17213 |
| Chapter IV. The Pine Processionary: Meteoroogy | 9293 |
| Chapter VIII. The Pine Processionary | 7141 |
| Chapter XIV. The Cabbage Caterpillar | 11500 |
