Fort Pierce, St. Lucie County, Florida, USA February 6, 2006 Size: 1.2cm
I should note that these bees are not sedate like a honeybee; rather they zip around at great speed, clutching onto flowers with great force. It seems from these shots that the bee is grabbing the flower with it's mandibles while the tongue probes deep inside.
Something about this bee reminds me of a Megachilid, but I can't quite put my finger on it, and none of the Bugguide images seems to match.