| Chapter VI. Instinct And Discernment | 8575 |
| Chapter VII. Economy of Energy | 6388 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 12462 |
| Chapter III. The Pine Processionary: The Procession | 13555 |
| Chapter IV. The Pine Processionary: Meteoroogy | 7658 |
| Chapter VIII. The Pine Processionary | 6066 |
| Chapter XIV. The Cabbage Caterpillar | 10408 |
