1212 
DIPTERA OF AUSTRALIA, 
Head somewhat longish round, compressed in the fore part, 
situated deep in the thorax ; front broad, the anterior border 
elongated triangularly, which extends to the basal joints of the 
antennae. Eyes oval. Ocelli two, large. Palpi prominent, in- 
curved, four-jointed ; first joint small, the others equally long, or 
the fourth the longest. Antennae projecting forwards, arcuated, 
2- -f 14-jointed ; joints of the scapus cyathiform, setiferous at the 
apex ; flagellar joints cylindrical, compressed from the side, with 
short downy pubescence. Thorax ovate, highly arched, with a 
short pubescence, longer hair on the lateral margins, setiferous on 
the hind border ; scutellum semi-circular or a shortened triangle, 
setiferous on the border ; metathorax highly arched. Abdomen 
of the with six segments, of the ^ with seven segments, more 
or less compressed from the side, narrowing at the base ; anal 
joint of the generally small ; ovipositor of the ^ with two 
laniellfe. Legs robust ; femora compressed ; tibiae spurred, the 
fore pair with small spines on the outer side, the intermediate pair 
with two ranges of strong spines on the outer side and one range 
of stronger or weaker ones on the inner side, the hind tibiae with 
two or three ranges of short spines on the outer side; metatarsus 
of the hind tarsi with fine prickles. Wings a little longer than 
the abdomen, longish-oval, the base rounded off or more obtusely- 
cuneiformly narrowed, microscopically pubescent. Auxiliary vein 
incomplete, bent anteriorly ; costal vein not extending beyond the 
tip of the second longitudinal vein and not reaching the apex of 
the wing; marginal cross- vein situated at, or somewhat beyond, 
the middle of the first longitudinal vein, and over the base of the 
second sub-marginal cell, the latter with a short j)etiole or sessile ; 
base of the somewhat e.xtended second postexdor cell situated 
before, under or a little beyond the base of the second sub- 
marginal cell ; the branches of the fourth longitudinal inclined 
towards one another at their tips ; fifth longitudinal vein in- 
complete ; rudimentary sixth longitudinal vein stout. 
