| Chapter VI. Instinct And Discernment | 7566 |
| Chapter VII. Economy of Energy | 5452 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 10845 |
| Chapter III. The Pine Processionary: The Procession | 10760 |
| Chapter IV. The Pine Processionary: Meteoroogy | 6436 |
| Chapter VIII. The Pine Processionary | 5049 |
| Chapter XIV. The Cabbage Caterpillar | 9421 |
