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Syrphid Flies? - Melissodes

Syrphid Flies? - Melissodes
Whitewater Draw area, Cochise County, Arizona, USA
June 20, 2016
Size: ?
After a little research, I think these are Syrphid Flies, which for the past few nights have been gathering on these lastyear's Sideoats Grama stalks on the north side of my house, and spending the night there. These photos taken a few minutes before sunrise this morning. Never seen this behavior
before. Any guesses on genus or species?


Moved from ID Request.

Bees, I think
Maybe something like these:

Hold on to see if others agree.

Welcome to BugGuide!

But likely a group of sleeping Melissodes