| Chapter VI. Instinct And Discernment | 7658 |
| Chapter VII. Economy of Energy | 5541 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 11086 |
| Chapter III. The Pine Processionary: The Procession | 11240 |
| Chapter IV. The Pine Processionary: Meteoroogy | 6557 |
| Chapter VIII. The Pine Processionary | 5231 |
| Chapter XIV. The Cabbage Caterpillar | 9588 |
