CONTENTS OF VOL. IV. 





JP | 



Letter. Page. 



XXXVII. Internal Anatomy and Physiology of 



Insects. Sensation 1 33 



XXXVIII. Internal Anatomy and Physiology of 



Insects continued. Respiration . . 34? 80 

 XXXIX. Internal Anatomy and Physiology of 



Insects continued. Circulation . . 81 101 



XL. Internal Anatomy and Physiology of 



Insects continued. Digestion. . . . 102 126 



XLI. Internal Anatomy and Physiology of 



Insects continued. Secretion .... 127 151 



XLII. Internal Anatomy and Physiology of 



Insects continued. Reproduction . 152 173 



XLIII. Internal Anatomy and Physiology of 



Insects concluded. Motion .... 174 203 



XLIV. Diseases of Insects 204 240 



XLV. Senses of Insects 241264 



XL VI. Orismology, or Explanation of Terms 265 363 



XL VII. System of Insects 364428 



XLVIII. History of Entomology 429485 



XLIX. Geographical Distribution of Insects; 

 their Stations and Haunts; Seasons; 

 Times of Action and Repose .... 486 527 



