Maybe a Common Long-horned Bee, Melissodes communis? - Melissodes communis -
Pinellas County, Florida, USA July 8, 2015
These bees are sleeping. I thought they were solitary bees but there were about 40 of them on 5 stalks of salvia. They came back to the same twigs for at least 5 days and then we had rain every day and I haven't seen them back since.