Australian Fruit Flies — HARDY 
141 
brown to black spot on the underside of 
the apex of each femur, and to having the 
tibiae tinged with brown. With a 
broad costal band and cubital streak. In 
teneral specimens the wing markings are 
very faint to absent. The first two costal cells 
are subhyaline to distinctly yellowish. The 
first cell has microtrichia only in the apical 
dorsal portion and the second cell is pilose 
except in the lower basal portion. The costal 
band extends through cell R3 to vein R4+5. 
The cubital streak fills all of the basal part 
of cell M4 and extends almost to the top 
margin of the m-cu crossvein. The streak 
fades out shortly beyond the apex of the 
cubital cell and there are no dense, shaggy 
hairs or closely set microtrichia along vein 
Cui+lst A. The narrowed portion of the 
cubital cell is about one and one-third times 
longer than the portion from the apex of the 
cubital cell to the wing margin. Abdomen: 
Chiefly rufous with a brown to black basal 
band on the third tergum and a brown to 
black median vitta extending down terga 
3 to 5. The bases of terga 1 and 2 are also 
brownish; the subbasal band on the second 
is sometimes black. The median vitta and the 
basal band on the third are variable. In some 
specimens, only the posterior lateral margins 
of the third tergum and the median portion 
of the fifth are distinctly marked with brown 
to black. 
FEMALE. The narrowed portion of the cubi- 
tal cell is just slightly longer than the distance 
from the apex of that cell to the wing margin. 
Ovipositor: Short and inconspicuous in dry 
specimens. The exposed portion of the ovi- 
positor is shorter than the fifth tergum. In 
in situ specimens the apex of the piercer and 
its peculiar distinctive shape can usually be 
seen. The extended ovipositor (Fig. 10^) is 
about 3.0 mm. long. The piercer has a 
characteristic constriction at its base and 
its apex is distinctively shaped. The piercer is 
approximately 1.4 mm. long by 0.19 mm. 
at its widest point. The oviduct extends to 
within approximately 0.21 mm. from the 
Fig. 10, Dacus iParatridacus) expdndens Walker: 
a, ovipositor, full length; b, apex of ovipositor. 
apex of the piercer. Slightly beyond the half- 
way point between the end of the oviduct and 
the apex the piercer is strongly constricted 
with a lobe-like projection on each side as in 
Figure 10^. The narrowed apical portion is 
about 0.08 mm. long. The setae are very 
inconspicuous and are situated at the basal 
three-fourths of the narrowed portion, about 
0.06 mm. from the apex of the piercer. The 
inversion membrane is approximately 1.4 mm. 
in length by 0.7 mm. wide. The scales are 
broad and blunt and extend to within 0.09 
mm. of the base. The basal segment of the 
ovipositor is about 1.3 mm. long by 1.2 mm. 
wide and the spiracles are located 0.23 mm. 
from the posterior lateral margins of the seg- 
ment. 
Length: Body, 8.0-10.0 mm.; wings, 7.5- 
8.5 mm. 
TYPE locality: "Aru Islands” (Aroe 
Island). 
Type in the British Museum. 
