1756 
DIPTERA OP AUSTRALIA, 
the latter very slightly tipped with white. Thox’ax pruinose- 
brown, with a small roundish dark spot laterally about the 
middle of its length and another immediately in fi'ont of 
the scutellum ; traversed by three longitudinal parallel double 
rows of moderately long black hairs intermixed with short 
slender shining white scales ; lateral margins slightly testaceous 
with a few scattered white scales and some short white hairs above 
and in front of the origin of the wings ; pieurie dark brown 
somewhat marbled with testaceous ; scutellum testaceous, with a 
dark roundish spot on the apex, fringed with long black hairs ; 
metanotum brown. Halteres black or very deep brown, the stem 
ochre-yellow. Abdomen about twice the length of the thorax, 
black, levigate, sparingly clothed with golden-yellow hairs (the 
terminal joint more densely) ; lamellae of the ovipositor black, 
fringed with short golden-yellow hairs. Coxae ochreous. Legs 
clothed with violet-black scales, the femora and tibiae bright 
ochreous beneath and very slightly at the tips. Coxae pale 
ochreous, without scales, slightly haired. Wings the length of 
the entire body, bright ochre-yellow at the base, hyaline, the 
veins very densely covered with scales, those on the costa, 
auxiliary and first longitudinal veins black, the remaining veins 
with black and yellowish scales arranged in alternate series, 
almost entirely black on the sixth longitudinal vein ; six 
patches of black scales ai’e prominent, situated at the fol- 
lowing points : — on the fifth longitudinal vein raid-way between 
its origin and the base of its fork, at the base of the fork, 
at the bases of the second and third longitudinal veins, and 
at the bases of the forks of the second and fourth longitudinal 
veins; the cilia on the costa between a point immediately above 
the tip of the first longitudinal vein and immediately below 
the tip of the third longitudinal vein pale yellowish or whitish, 
the remaining cilia violet-black with a light sei’iceous reflection. 
Auxiliary vein reaching the costa opposite the middle cross-vein ; 
second longitudinal vein beginning some distance before the 
marginal ci’oss-vein ; supernumerary and middle cross-vein oppo- 
site one another, situated beyond the posterior cross-vein a distance 
