Micah Beals -- aka, Micah Femia -- was filmed this week harassing a couple guys on a NYC subway train over their mask-wearing ... and things got ugly quick.
Check out the clip ... you see a man we're told is Beals, who has appeared on "Parks and Recreation" and other shows, sitting by himself on a bench before turning his attention to another man down the way -- taunting and insulting the guy over his face covering.
The man seems to do a good job at ignoring Beals, but the dude persists in his barbs -- calling him a sheep, a "p***y" and then finally, a homophobic slur. Beals also appears to be drinking a beer, and once he realizes he's being filmed by a second person across from him ... he zeroes in there too.
The end of the video appears to show Beals ramping up to kick the man recording, but cuts out before we can see what happened.
We've got a call in to cops to see if Beals was reported. No word back yet.
Speaking of NYPD, Beals is the same guy police ID'd for allegedly splashing paint onto a bronze bust of George Floyd in Union Square a few months back ... and he ended up getting charged with criminal mischief. That incident, too, was caught on camera.
MB was a working actor back in the late 2000s and early 2010s, with appearances on 'Parks and Rec,' "Pop Star," 'CSI' and other short films as well. It doesn't look like he's done much since 2013.