ite) SYRPHIDE. 
joint being a little yellowish below near the base, with a long, 
shortly plumose arista; proboscis shining black, with yellowish 
labella. Thorax quadrate, punctate, black, with indistinet purplish 
reflexions; humeri yellow, there is also another smaller yellow 
spot on the inner side of adh humeral callus; sides of the suture 
with an abbreviated yellow band; the postalar calli and a band 
just before the scutellum also yellow; pleure shining black, 
the propleure and a vertical band across the mesopleurz yellow ; 
this band is clothed with long yellowish hair and is attenuated 
below and dilated above, where it is in contact with the sutural 
band. ‘The dorsum of the thorax is clothed with dark and yellow 
hair, which latter forms a median longitudinal band, which is bifid 
in front, a broadly oes od sutural band, and a complete one 
before the seutellum:; there are also some very long black bristles, 
a group of shorter ones in at and four very long ones behind 
them, and besides a row of short bristles before the seatellabas the 
external ones being longer and decussate. Scutellum black at the 
base, yellow below and on the sides; the entire middle is occupied 
by a very broad and deep depression, which is black and grey- 
dusted in the centre; the seutellum bears golden-yellow hairs on 
the sides and along the hind border, and four very long black 
bristles, the middle ones decussate. Metanotum shining black ; 
squamule whitish, with a yellowish fringe ; halteres white. 
Abdomen oval, blunt at the end, convex, very strongly punctate ; 
first segment vellow, with a smooth and glittering median depression 
below the seutellum,; the sides produced anteriorly, forming two 
very prominent tubercles; the succeeding segments are yellow, 
punctate throughout, with only a linear shining band on the front 
border of the second segment, before which the border is granulated, 
and a narrow band on the hind margin of same segment; the hairs 
are whitish and erect on the sides, “golden yellowish and depressed 
in the middle, becoming longer on the fourth segment; there are 
two lateral black stripes, one on each side, running from the pre 
border of the second to the hind border of the fourth segment ; 
the middle of the second, third, and fourth segments there are oe o 
brownish indistinct divergent spots, forming the usual triangle. 
The venter is greatly sunken, surrounded by a raised margin, 
shining yellow, black at the end. Legs, including the coxze, entirely 
yellow, the hind pair strong and thickened, with short but dense 
yellow. hairs; tarsi darkened at end; hind femora with the apical 
half a little reddish; hind tibie without stout black bristles 
externally ; basal joint of middle tarsi long and thin, as long as the 
other joints together. Wings with a yellowish- grey tinge : and the 
usual venation, with no trace of a vena spuria ; ‘the stumps of 
veins at the lower angles of the first posterior and discal cells very 
long, longer than in the preceding species; stigma brown; sub- 
costal cell yellow, brown at the end; the first oblique brown band 
begins at the stigma and ends at the fourth vein near the small 
eross-vein ; the second broader band begins at the end of the first 
vein and ends broadly in the first posterior cell, where it fuses 
