Moved from Platycheirus.

Clear ID on this one, from Young et al 2016:

1: male -> 2
2: foretibia appears slender throughout -> 49
(see figs 118-120 for slender, 114-117 for broad) - yes, slender
49: posterior surface of forefemur without setae -> 53
(see figs 41,119,120 for fine pile, fig118 for setae) - really distinct vs lots, setae if you can count them, pile elsewise
53: fore and mid tibia with stronger setae, facial pollinosity rippled -> 54
(f79 for weak, uniform; f119-120 for strong, rippled)
54: first tarsomere with short posterior setae -> 56
(f119 for short pile, f35 for longer setae)
56: fore and mid tibia with shorter setae, faint pollinose ripples on face -> 57
(f30 for longer setae, f79,119 for shorter setae)
57: facial pollinosity rippled, wing membrane appears pale basally -> 58
58: face with ripples, lateral tergite pile white, fore tibia with thickened setae only on apical 2/3, much thinner than arista -> 59
59: face with faint lateral ripples, fore tibia setae thin -> 63
63: face slightly produced below, femurs orange only on tip -> 65
(f41/88/98 for slight protrusion, orange tips, f70/108 for more produced and more orange)
65: wing membrane more trichose, some pile on katepisternum black -> confusus

Moved from Melanostoma mellinum.

Moved from Syrphinae.

Moved from Flies.