IV CONTENTS. 



PART II. DETAILS OF THE ANATOMY OF THE FLY. 



Section I. The Integument of the Head 37 



Section II. The Proboscis 41 



Section III. The Salivary Glands and Ducts 51 



Section IV. The Alimentary Canal and its Appendages. 53 



Section^. The Rectal Papilloc 57 



Section VI. The Integumen t of the Thorax 61 



Section VII. The Thoracic Appendages 65 



Section VIII. The Abdominal Segments 70 



Section IX. The Respiratory Organs 71 



Sectien X. The Dorsal Vessel ... 75 



Section XL The Nervous System 77 



Section XII. The Compound Eyes 84 



Section XIII. The Ocelli 89 



Section ~X.IV. The Antennce 91 



Section XV. The Maxillary Palpi 93 



Section XVI. The Frontal Sac 94 



Section XVII. The Cephalo-Sternum 95 



Section XVIII. The Halteres and Wing Organs 96 



Section XIX. The Folliculate or Ductless Glands 100 



Section XX. The Male Generative Organs 101 



Section XXI. The Female Generative Organs 107 



Section XXII. The Development of the Ovum 113 



Section XXIII. The Formation of the Pupa 116 



