25 
of the scutellum, a long curved one on each side, a short one on 
each side of the median line in front, and another short one on 
the outside of each of the curved lines behind ; scutellum brown, 
with a basal hand of pure silvery- white, composed of a single 
row of flat broad scales, a few also on the mid lobe ; bristles 
black, there being five in the middle lobe ; pleura? paler brown 
than the rest, with six large and several smaller patches of white 
scales ; metanotum pale brown ; mesonotum beset with 
numerous long black bristles. Abdomen covered with black 
scales with purplish reflections, each segment with a basal lateral 
patch of silvery-white scales, and a few white scales on the base 
of the segments every here and there ; posterior borders with 
golden-brown scales ; first segment deep ochraceous, with 
ochraceous and black scales, and numerous golden hairs. Legs 
with the coxa? pallid, femora black, pale at the base and down 
one side with a silvery-white line in front and a white apical 
spot ; tibia? black, also with a pure silvery-white line along its 
length ; metatarsi black, with broadish basal white bands ; in 
the fore legs the first tarsal joint with a basal white ring, remainder 
black, and in the mid legs there is a trace of basal white banding 
on the second joint as well ; in the hind legs all the tarsi have a 
broad basal white band, save the last, which is pure white except 
for a patch of brown scales below at the apex ; front ungues 
equal, with a single tooth on each, mid and hind equal and simple, 
the latter very small. Wings with the veins covered with black 
scales, their apical terminations with long thin lateral scales and 
shorter broad ones also lateral ; first sub-marginal cell consider- 
ably longer and narrower than the second posterior cell, its base 
almost level with that of the latter, if anything a little nearer 
the base of the wing ; stem less than one-third of the length of 
the fork-cell ; second posterior cell about one and a-third times 
the length of its stem ; posterior cross-vein twice its own length 
distant from the mid cross-vein ; fringe grey. Halteres with 
pale stem and black knob. 
Length, 4 to 5 mm. 
$ . Head covered with black scales with a border of silvery- 
white ones round the greenish-golden eyes, a patch of ochraceous 
scales in tli3 middle of the back of the head and a row of black 
bristles projecting forwards. Antenna? brown, banded, verticils 
silky brown, basal joint with a small patch of silvery- white scales ; 
palpi ochraceous-brown, sparsely covered with dark brown 
scales basaJly, becoming jet black towards the apex, tast two 
joints with broad basal bands of pure white scales j proboscis 
black, with a band of pure white on the base of the apical half. 
Abdomen like the $ , but with a distinct basal band of ochraceous 
and white scales, the silvery lateral basal spots not so distinct on 
the anterior segments ; genitalia brown. Legs as in the $ , but 
the basal band on the second tarsal joint of the mid legs is often 
not visible ; ungues of fore and mid legs unequal, the larger one 
