| Chapter VI. Instinct And Discernment | 8408 |
| Chapter VII. Economy of Energy | 6232 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 12216 |
| Chapter III. The Pine Processionary: The Procession | 13159 |
| Chapter IV. The Pine Processionary: Meteoroogy | 7448 |
| Chapter VIII. The Pine Processionary | 5907 |
| Chapter XIV. The Cabbage Caterpillar | 10258 |
