| Chapter VI. Instinct And Discernment | 9697 |
| Chapter VII. Economy of Energy | 7332 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 14420 |
| Chapter III. The Pine Processionary: The Procession | 16691 |
| Chapter IV. The Pine Processionary: Meteoroogy | 9041 |
| Chapter VIII. The Pine Processionary | 6945 |
| Chapter XIV. The Cabbage Caterpillar | 11273 |
