Excellent images; great clarity
Nice work, Dave. #3 is a member of the Dolichopodidae Family of Long-Legged Flies. See: http://bugguide.net/node/view/100
I see these often in the Chicago area.
Sorry I can't help on the IDs of the other two specimens.
Dave, nice set of images.
I'm no entomologist, but I do wonder if your beetle is a jewel beetle. (Acmaeodera sp)
It looks similar to the beetle in the link below....
http://www.biolib.cz/en/taxonimage/id264115/
'Can't help with the ID either, Dave, but the last one is pretty.