| Chapter VI. Instinct And Discernment | 6455 |
| Chapter VII. Economy of Energy | 4408 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 9256 |
| Chapter III. The Pine Processionary: The Procession | 7559 |
| Chapter IV. The Pine Processionary: Meteoroogy | 5507 |
| Chapter VIII. The Pine Processionary | 3654 |
| Chapter XIV. The Cabbage Caterpillar | 7931 |
