#1
Moscow region, 15 june, 9-10mm
Eyes seems very few hairy, f3 - black-yellow
#2
Clearly a Syrphus species. The narrow and pale abdominal fasciae suggest S. torvus, but this character is variable and always needs verification by the combination of hairs on the eyes, microtrichia on the wings and partly black posterior femora. So, it's very hard to tell from this picture...
#3
Thank you Menno.
Sorry to send so many Syrphus, but this one is collected.
f3 - 3/4 black, as far as I can see - all wing in microtrichias, eyes hairy.
Nikita