| Letter | | Page |
| |
| XVI. | Societies of Insects. | |
| | 1. Imperfect Societies | [1]-[25] |
| |
| XVII. | Societies of Insects continued. | |
| | 2. Perfect Societies. | |
| | White Ants. Ants | [26]-[106] |
| |
| XVIII. | Perfect Societies of Insects continued. | |
| | Wasps. Humble-bees | [107]-[118] |
| |
| XIX. | Perfect Societies of Insects continued. | |
| | Hive-bee | [119]-[167] |
| |
| XX. | Perfect Societies of Insects concluded. | |
| | Hive-bee | [168]-[214] |
| |
| XXI. | Means by which Insects defend themselves | [215]-[266] |
| |
| XXII. | Motions of Insects. | |
| | Larva and Pupa | [267]-[299] |
| |
| XXIII. | Motions of Insects continued. | |
| | Imago | [300]-[370] |
| |
| XXIV. | Noises produced by Insects | [371]-[403] |
| |
| XXV. | Luminous Insects | [404]-[424] |
| |
| XXVI. | Hybernation and Torpidity of Insects | [425]-[459] |
| |
| XXVII. | Instinct of Insects | [460]-[523] |