1947] 
Hull — Syrphid Flies 
233 
pollinose ; the lunate antennal callus is yellowish brown, 
blackish in the middle. The face is metallic blackish on 
the upper half becoming light yellowish brown on the 
tubercle and the cheeks; the middle of the cheeks with 
a brownish spot. The antennae are yellowish brown. 
Thorax: the mesonotum is strongly brassy black, coppery 
just in front of the postcalli; the lateral margins and the 
notopleura appear to be yellowish brown in ground color 
but so dark as well as metallic in reflections that they do 
not contrast greatly with the disc of the mesonotum. The 
mesonotum has a pair of short, obscure, brownish red 
pollinose vittae and some sparse, similar pollen in front 
of the scutellum. The mesonotal pile is sparse, short and 
apparently light in color ; pleura metallic black, only the 
posterior part of the mesopleura and the anterior part 
of the pteropleura are obscure yellowish brown; the 
squamae are light yellow, the stalk of halteres pale yellow 
with reddish brown knob. Ahclomen: very slender and 
petiolate, the first segment black, its protuberant lateral 
margins light brownish yellow. The spots of the ab- 
domen are sharp and distinct but are for the most part 
pale brownish orange. On the sides of the base of the 
second segment there is a quite long spot of light color, 
occupying about a third of the length of the segment 
sharply and distinctly separated by black in the middle ; 
beginning just before the middle of the segment there is 
a long, complete pale band occupying a little more than 
one-fourth the length of the segment; remainder of this 
segment shining black. The second segment is fifteen 
times as long as its least width and not quite twice as 
wide at apex and just twice as wide as its base. The 
third segment has two long, complete bands of light color, 
one on the base, one beginning just before the middle of 
the segment, divided by a narrow brown line; the fifth 
segment is wholly black; the hypopygium is prominent. 
The pile along the second segment is very sparse and 
short. Legs: the anterior legs are entirely brownish yel- 
low, the middle legs missing. The posterior femora and 
tibiae are very pale yellowish brown, their tarsi almost as 
light ; the dorsal surface of these tarsi is pale brown with 
