1182 
DIPTERA OF AUSTRALIA, 
151. PSEUDOPLATYURA DUX, Sp.n. (PL XXXI., fig. 7.) 
— Length of antennee 0-0.30 inch ... 0-76 millimetre. 
Expanse of wings 0-130 x 0-040 ... 3-30 x 7’01 
Size of body 0-150 x0 020 . . 3-81 x0-50 
9 . — Length of antennae 0-027 inch ... 0-67 millimetre. 
Expanse of wings 0-135 x 0-045 ... 3-42 x 1-13 
Size of body 0-135 x0-020 ... 3-42 x0-50 
and $. — Antemife slender, shorter than the thorax ; joints of 
the scapus ochraceous-brown, very sparingly pubescent ; flagellar 
joints deep brown or black. Hypostoma and palpi brown. Front 
and vertex deep brown or nearly black. Thorax brown, with 
three ill-defined longitudinal double rows of short brown hairs, 
not coalescent posteriorly ] the lateral borders and scutellum with 
very long setaceous hairs ; pleurae, scutellum and metathorax 
bi-own. Halteres brown, the stem ochraceous, sprinkled with very 
short hairs. Abdomen slender in the about three times the 
length of the thorax, shorter and rather moi-e dilated in the 9 > in 
both sexes the seventh segment small ; brown, with the first two 
segments and venter moi-e or less ochraceous-brown, den.sely clothed 
with brown hairs ; ^ forceps deep brown, densely haired, about 
the -width of the terminal abdominal segment ; lamellae of 9 
positor blown. Coxae and femora ferruginous-ochraceous ; tibite 
brown; tarsi dusky brown. Tibial spurs black. In the fore-legs 
the tibiae J longer than the metatarsus. Wings pellucid, with a 
greyish tint, not darkened at the apex ; brilliantly iridescent ; 
costal and first two longitudinal veins brown, the rest yellowish- 
brown. Auxiliary vein joining the costa opposite or almost 
imperceptibly before the tip of the marginal cross-vein ; marginal 
cross-vein pale and rather indistinct ; anterior branch of the 
second longitudinal vein tolerably long and oblique, its base 
situated as much before the tip of the first longitudinal vein as its 
tip is beyond ; costal vein extending beyond the tip of the second 
longitudinal vein | the distance from that to the tip of anterior 
