1944 ] Studies on Syrphid Flies 37 
a transverse band across in front of the antennae including the 
short antennal prominence and a conspicuous round spot just 
beneath the antennae, everywhere light brownish yellow; the ex- 
ceptions noted are brown. The following areas are also brown: 
an oval spot or stripe diagonal from the corner of the eyes to the 
back of the occiput in which there is an impressed line, the area 
immediately around the ocelli, a conspicuous round spot beneath 
the antennae all brown. There is a large, transverse spot above 
the antennae, including the short but black antennal prominence 
which is reddish brown and is widely separated from the eye 
margins. Antennae light brown; second joint half as long as first, 
third joint missing; antennal pile dark brown; extreme base of 
first joint with a black annulus. Face rather conspicuously con- 
cave just above the middle with very sparse pale pile. Eyes bare. 
Thorax: chiefly light brownish-yellow, with a short pair of sub- 
median, slender, brown stripes that are almost fused with a much 
wider pair of stripes that lie on either side of the thorax and run 
throughout its length and slightly converge posteriorly and whose 
anterior lateral ends fill out the entire corners of the thorax be- 
hind the humeri, leaving, however, a large yellow spot before the 
suture. Pleurae wholly pale, shining yellow, almost bare with a 
single diagonal reddish stripe from base of wing down to hind 
coxae and a brown stripe behind the metapleurae. Scutellum 
broadly brown across the disc, the base and the posterior margin 
yellow; somewhat triangular in shape with rounded apex. Meta- 
no turn yellow; humeri yellow; squamae yellow with a brown 
margin and fringe; halteres brownish yellow. Abdomen: elongate, 
quite petiolate; the first and second segments are subcylindrical, 
fused, narrowest in the middle and not quite as long as the re- 
maining three segments. There is a reddish stripe running from 
the base of the second segment diagonally down the long second 
segment to meet the opposite stripe in the middle a short way 
from the end of the segment ; elsewhere the first two segments are 
shining yellow. The remainder of abdomen is light brown, the 
posterior third of the third segment uniformly light yellow; pile 
of abdomen everywhere pale. Legs: wholly light yellow, the 
apical two-thirds of the hind femora a little darker; pile of legs 
wholly yellow. Wings: large and long, longer than abdomen, 
faintly brownish-yellow along the anterior half with stigmal cross 
vein, very short anterior cross vein and with a practically straight 
subapical cross vein that joins the third vein approximately at a 
