xvil 



INTERNAL ANATOMY 



259 



each limb being separated from the following one by a more 

 or less sharp bend. The fifth, sixth and seventh limbs together 

 form a well-marked loop, which is generally the most dilated 

 portion of the intestine and is sometimes regarded as the true 



Fig. 66. Internal Anatomy of Glossina palpalis. (After Minchin, from 

 Roubaud.) 



A.R., rectum; G.c.g., junction of the two salivary ducts (G.gl.) ; 

 Gl.S., salivary glands ; G.J., duct of sucking stomach ; I.M., intestine ; 

 I.th., thoracic intestine; /., sucking stomach; Oes., oesophagus; Ph., 

 pharynx ; Pr., proventriculus ; P.R., rectal papilla; ; R, hind-gut. 



stomach. Posteriorly the intestine passes into the capacious 

 rectum which has four rectal glands, each supplied by a bunch 

 of small tracheae. 



The appendages of the alimentary tract are the salivary 

 glands, the sucking stomach or crop, and the Malpighian tubules. 



17 — 2 



