Lyons, Boulder County, Colorado, USA July 2, 2011 Size: 6.5-7 mm to wing tip
This bee or wasp was on Miner's Candle (Oreocarya virgata --Borage Family). Location is 6 miles NW Lyons at elevation of about 6400'. Possibly one of the cuckoo bees, Nomadinae? Any help is much appreciated.