A short field note:  I ran across a group of male Melitta americana feeding on farkleberry (Vaccinium arboretum) in a deforested area near a woodland.  The next day I found about a dozen females in the same site feeding on deerberry (Vaccinium stamineum) intermingled with the farkleberry.  Over the next three days, I saw females in the area collecting pollen exclusively from deerberry.  Males drank nectar from both sparkleberry and deerberry.   Melitta americana is sometimes described as a deerberry specialist, but there are records of it feeding on huckleberry and Rubus, and on a range of Vaccinium, including cranberry.

Melitta americana is not common in north central Florida. For example, Melitta did not appear on a survey by Hall & Ascher (2010) of Gainesville/Alachua County bees.  Melitta americana  does appear (as the single Florida Melitta species) on the University of Florida bee key:  (https://entnemdept.ufl.edu/hallg/melitto/floridabees/melittidae.htm). That key reports that the species has been documented in Alachua County.  The Discover Life database reports Melitta americana northwest of Gainesville, and Melitta americana appeared recently on I-Nat in southwest central Florida. The similar Melitta eickworti has been found in Georgia, but its usual range is the Carolinas through New England;  I haven't found any reports of it in Florida.