| Chapter VI. Instinct And Discernment | 10132 |
| Chapter VII. Economy of Energy | 7639 |
| Chapter II. The Pine Processsionary: The Nest; The Community | 15138 |
| Chapter III. The Pine Processionary: The Procession | 17633 |
| Chapter IV. The Pine Processionary: Meteoroogy | 9407 |
| Chapter VIII. The Pine Processionary | 7241 |
| Chapter XIV. The Cabbage Caterpillar | 11624 |
