Australian Fruit Flies — Hardy 
185 
Fig. 32. Rioxa pornia (Walker); a, wing; b, ovipositor, full length; c, apex of ovipositor. 
setae are situated on each side just beyond the 
oviduct opening, and a row of six to eight 
setae are situated near the sides of the ventral 
margin and extend basad to beyond the 
middle of the segment. The inversion mem- 
brane is about 0.77 mm. long by 0.32 mm. 
wide. The rasper is not made up of scales but 
is composed of numerous raised ridges which 
bear microscopic dentations on their hind 
margin. The rasper extends about half the 
length of the segment, or about 0.38 mm. 
from the base. The basal segment of the ovi- 
positor is about 0.8 mm. long by 0.8 mm. at 
its widest point. The spiracles are located very 
