320 



Page 



C. The Respiratory System 386 



The Larval Respiratory System ... ... ... 386 



The Destruction of the Larval Tracheae ... ... 391 



The Regeneration of the Tracheal System ... ... 393 



D. The Muscular System 398 



The Anatomy of the Larval Muscular System ... 398 



The Structure and Post-embryonic Development of 



the Larval Muscles ... ... 400 



The General Body Musculature ... ... ... 400 



The Dilators of the Pharynx -403 



The Destruction of the Larval Muscoilature ... 404 



The Dilators of the Pharynx 404 



Thoracic Muscles ... ... ... ... ... 404 



Muscles of the Abdomen ... ... ... ... 404 



The Longitudinal Abdominal Muscles ... 404 



The Vertical Abdominal Muscles 406 



The Regeneration of the Muscular System ... ... 408 



The Superficial Longitudinal Abdominal Muscles 409 



The Vertical Abdominal Muscles ... ... ... 411 



The Dilators of the Pharynx ... ... ... 411 



Muscles of Mouth Appendages ... ... ... 413 



The Leg Muscles 416 



The Muscles of Ovipositor ... ... ... ... 417 



The Muscles of Flight , 418 



Intestinal Muscles ... ... ... ... ... 425 



The Muscle Insertions ... ... 426 



The Structure of the Adult Muscles 426 



E. The Intestine and Related Structures ... 428 



The Anatomy and Structure of the Intestine of the 



Adult 428 



General Morphology 428 



Histological Structure ... ... 429 



Oesophagus ... ... ... ... ... 429 



The Crop 430 



The Gizzard , 430 



The Stomach 431 



The Small Intestine 431 



The Rectum 431 



The Salivary Gland "... 432 



The Malpighian Tubes 433 



The Intestine of the First Larval Instar ... ... 433 



General Morphology ... ... ... 433 



Histological Features ... ... ... ... 43o 



The Buccal Cavity 435 



The Oesophagus ... ... ... ... ... 43«5 



