1158 
DIPTERA OF AUSTRALIA, 
scapus spheroidal, the second more cupuliform ; the first flagellar 
joint cylindrical, the upper ones setiform, pubescent, a little 
setiferous on the under side ; the last two joints densely covered 
with longer hair and setae. Thorax oval, highly arched ; scutellum 
small, almost semi-circular ; metathorax highly arched. Abdomen 
flattened, almost cylindrical, in the 9 broadest in the middle; 
with seven segments in both sexes. Legs slender, long, the fore 
ones short ; tibiae spurred, the spurs very small ; lateral spines 
wanting. Wings hairy or only microscopically pubescent, large, 
broad, with a very broad base ; usually longer than the abdomen ; 
half open in repose. Auxiliary vein complete, terminating in the 
costa, and united to the first longitudinal vein by the sub-costal 
cross-vein ; costal vein extending far beyond the tip of the second 
longitudinal vein, and almofst reaching the apex of the wing ; 
second longitudinal vein very much arched, forming a long-stalked 
fork, the anterior Vjranch always very short, lying in a very 
very oblique position, terminating in the costa ; fifth longitudinal 
vein more or less undulated. 
A. Wings microscopically haired. 
a. Wings unspotted. 
138. Macrocera delicata, sp.n. 
— Length of antenuie 0'300 inch ... 7‘62 millimetres. 
Expanse of wings 0‘l60 x0 057 ... 4‘06xL44: 
Size of body 0T80 x 0'020 ... 4’56 x 0 50 
Antennae two-fifths longer than the body ; joints of the scapus 
ochraceous-brown ; all the flagellar joints deep brown, appearing 
alraose cinereous in a certain light. Hypostoma ochraceous-brown. 
Fi'ont and palpi brown. Thorax bright ochraceous-brown inclining 
to ferriiginons, nitidous, with three very narrow, rather indistinct, 
longitudinal ochraceous lines, the intermediate one disappears 
about the middle of the thorax, the lateral ones have each a row 
of black hairs, continue to the scutellum, and do not coalesce ; the 
space enclosed by the lines gradually deepens into brown towards 
the collare ; the hairs of the longitudinal rows short until past the 
