140 
Psyche 
[December 
apically, each with an irregular row of six or seven short, 
stout bristles at the tip. Antennae small, oval; the arista 
longer than the head-height, with very short pubescence. 
Mesonotum finely pubescent, with one pair of dorsocentral 
macrochaetae and some strong bristles along the lateral mar- 
gins. Propleura with two large bristles (one above the 
other) below the spiracle; also a fan-shaped series of four 
or five above the base of the coxa, the anterior one large 
and the others rapidly becoming smaller. Mesopleura en- 
tirely bare. Front tibia with a large bristle externally just 
before the middle and a series of about seven on the apical 
half, the latter small but clearly bristles and not strong 
hairs. Middle tibia with a pair of strong bristles externally 
at the base and two hair-seams with a groove between 
which bears a scattering row of hairs ; the inner hair-seam 
is complete, but the outer one extends only to a little beyond 
the middle; beyond this there are several oblique rows of 
comb-like bristles and a series of small bristles that lie near 
the hair-seam and form the apical part of the row of hairs 
in the groove. Hind tibise with two complete, strong hair- 
seams on the dorsal edge, connected by eight strongly 
oblique rows of strong comb-like bristles; in addition with 
a series of scattering bristly hairs in the groove between 
the seams, these not very easily noticed on account of the 
conspicuous oblique rows of bristles that extend across 
them. Scutellum with four equally strong bristles. Sides 
of second segment of abdomen bare ; third to fifth tergites 
subequal in length; sixth twice as long. Costa extending 
nearly to the middle of the wing, its bristles fine and closely 
placed ; first section four and one-half times as long as the 
other two together since the first, second and third veins 
enter the costa very close together, the second almost mid- 
way between the first and third ; fourth vein lying unusually 
near the costal margin, gently arcuate and strongly re- 
curved at the tip; fifth and sixth veins very little curved; 
seventh strong. Halteres pale brownish yellow. 
Female. Resembles the male, except that the four ter- 
gites of the abdomen are entirely yellow. The third and 
fourth are small and no fifth one is visible. 
One specimen of each sex; male from Sydney, New South 
