| Letter. | | Page. |
| |
| XXXVII. | Internal Anatomy and Physiology of Insects. Sensation | [1]-[33] |
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| XXXVIII. | Internal Anatomy and Physiology of Insects continued. Respiration | [34]-[80] |
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| XXXIX. | Internal Anatomy and Physiology of Insects continued. Circulation | [81]-[101] |
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| XL. | Internal Anatomy and Physiology of Insects continued. Digestion | [102]-[126] |
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| XLI. | Internal Anatomy and Physiology of Insects continued. Secretion | [127]-[151] |
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| XLII. | Internal Anatomy and Physiology of Insects continued. Reproduction | [152]-[173] |
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| XLIII. | Internal Anatomy and Physiology of Insects concluded. Motion | [174]-[203] |
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| XLIV. | Diseases of Insects | [204]-[240] |
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| XLV. | Senses of Insects | [241]-[264] |
| |
| XLVI. | Orismology, or Explanation of Terms | [265]-[363] |
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| XLVII. | System of Insects | [364]-[428] |
| |
| XLVIII. | History of Entomology | [429]-[485] |
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| XLIX. | Geographical Distribution of Insects; their Stations and Haunts; Seasons; Times of Action and Repose | [486]-[527] |
| |
| L. | On Entomological Instruments; and the best Methods of collecting, breeding, and preserving Insects | [528]-[559] |
| |
| LI. | Investigation of Insects | [560]-[573] |
| |
| | Appendix | [575]-[584] |
| | Authors quoted | [585]-[602] |
| | Explanation of the Plates | [603]-[614] |
| | Indexes | [615]-[683] |