Eristalis brousii

The frontal triangle is slightly shiny along the middle. In a female, the front is reddish pollinose and more shiny above the antennae. The face is black, shiny, thickly clothed with yellow pollen and pile, leaving the tubercle, the oral margin, and the cheeks shining black. The antennae are black with third joint (flagellum) somewhat reddish. The eyes are pilose and in the male contiguous for a short distance only. The arista is reddish and briefly pilose near the base. The posterior lateral orbits are white pollinose.

The scutum is shining black and with a coppery luster. Two opaque, lighter colored, rather broad stripes reach from the front to the scutellum. These are limited by three narrow, opaque, black stripes. The pile of the scutum is light reddish yellowish, scarcely apparent from above. The scutellum is subtranslucent yellowish or reddish on the outer part. The pile of the pleurae is whitish.

The wings are hyaline with a minutely brownish stigma. In females the wing has a large faint brownish spot. Noteworthy veination - Spurious vein (sv), looping of R₄₊₅ into r₄₊₅, closed cell r₂₊₃. Anterior cross-vein (r-m) near the middle of discal cell (dm), oblique.

Eristalis brousii abdomen

On the abdomen of a male, the first segment is all black, the second orange-yellow, broadly on the sides and narrowly across on the hind border, elsewhere opaque black; on the posterior, nearly a third of the width of the segment is black; the sides approach each other a little towards the front and then at nearly right angles extend outward along the anterior margin of the segment; the lateral prolongations are convex on their hind borders and reach acutely nearly to the lateral margins; third segment with large, similar colored spots, confluent with the yellow in front, but rounded on the internal posterior angles and usually not quite reaching the yellow of the hind margins; across the middle of the segment a shining metallic band interrupted in the middle, elsewhere the black is opaque; fourth segment wholly shining, with a narrow yellow hind margin and sometimes with a small spot of opaque black in front; hypopygium shining black. In the female the markings are rarely like those of the male, chiefly shining black; the second segment sometimes includes a small, opaque, red dish spot on the side, as in the male; the third and fourth segments sometimes with a small opaque spot in front; on the second, third, and fourth segments, a rather broad whitish pollinose may be located on the hind border; the hind margins more narrowly reddish yellow.[3][4]

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  Eristalis wing
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  Insect leg
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  Eristalis head
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  Syrphid antenna
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  Dorsal view of Syrphid thorax