1200 
DIPTERA OF AUSTRALIA, 
scapus cyathifoi’m, the second one setiferous at the apex ; 
flagellar joints cylindrical, with very short pubescence. Thorax 
ovate, highly arched ; scutellum small, almost semi-circular ; 
metathorax high, acclivous. Abdomen slender, with six seg- 
ments ; in the ^ almost cyliudi’ical, narrowing posteriorly, with a 
shortened anal joint and small forceps ; in tlie 9 little flattened, 
ending in a thick ovipositor, which has two small lamellie at its 
apex. Legs strong ; femora, particularly the hind pair, broadly 
compressed ; tibiae spurred and with lateral spines, the fore pair 
have on their outer side a range of short spines, and a single 
prickle on the inner side a little above the middle, on the 
outer side near the range, a little below the middle, and on 
the apex near the spurs, these separate spines not stronger 
than the othei’s ; hind tibiai towards their outer side with 
three ranges of very strong spines, and the intermediate pair 
with a single spine, which is longer than all the others, on 
their inner side a little above the middle. Wings longer than 
the abdomen, longish-oval, rounded off at the base; microscopi- 
cally pubescent. Auxiliary vein reaching to about one-third of 
the anterior border, and not united by a sub-costal cross-vein to 
the first longitudinal vein ; costal vein extending a great deal 
beyond the tip of the second longitudinal vein, but not as far as 
the apex of the wing ; first longitudinal vein, which terminates 
in the costa a little beyond the middle of the anterior border, 
united to the second longitudinal vein by the marginal cross-vein 
almost opposite the middle of the wing-disk, consequently the 
inner marginal cell is almost half the length of the wing; third 
longitudinal vein bent upwards a little, reaching the margin 
immediately below the apex of the wing ; anterior branch of 
the third and fourth longitudinal veins detached at the base, 
the former ending in the margin between the tip of the costal 
vein and the apex of the wfing ; base of the second posterior 
cell situated much before the origin of the third longitudinal 
vein ; fifth longitudinal vein present only as a rudimentary root. 
