1905. ] Anatomy of the Tsetse-fly (Glossina palpalis). 537 
running first anteriorly, then transversely, and lastly in a posterior direction. 
It is more ventral in situation, being placed below some of the succeeding 
coils. The third limb (3) is short, and runs straight forward on the right 
side from the fifth to the third segment. Not visible in fig. 2, its position is 
indicated in fig. 3. The fourth limb (4) turns at right angles, and runs 

Fie. 3.—Diagram to show the various limbs (1—13) of the abdominal intestine, and their 
arrangement in the abdomen. The asterisk * denotes the point at which the 
Malpighian tubules arise in the tenth limb. 
transversely across the body in the third segment, passing back a short 
distance into the fourth. The fifth limb (5) turns sharply back on the fourth 
and runs. dorsally to it across the body ayain in the third segment. The 
sixth limb (6) turns back at a right angle and runs back on the right side of 
the body from the third to the sixth segment. The seventh limb (7) turns 
sharply forwards, then curves round in a roughly semi-circular course in the 
third segment, and finally runs backwards on the left side as far as the fifth 
segment. The fifth, sixth, and seventh limbs form together a well-marked 
loop, lying superficially, which is generally the most dilated portion of the 
intestine. The eighth limb (8) bends sharply forwards and downwards, and 
runs deep on the left side from the fifth to the third segment. The ninth 
limb (9) bends at right angles and runs at first transversely in the third 
segment, then curves back into the fourth, then forwards again into the third 
segment. ‘The tenth limb (10) runs backwards along the right side of the 
body from the third to the sixth segment, and in the fifth segment gives off 
