Genus Coleomegilla, rather than Hippodamia, can be considered as granted. Now, it is likely to be another species than C. maculata, as this latter's range doesn't extend as far South as Florida.

according to Gordon's ref.(1), a subspecies of C. maculata, C. m. fuscilabris (Mulsant) does occur in Florida (and along the coasts, west to Louisiana, and north to Myrtle Beach SC). The dominate subspecies, C. m. lengi Timberlake occurs throughout the eastern US (except northern New England, and Florida) and west to the great plains. And the third subspecies, C. m. strenua (Casey) occurs along the Mexican boarder from Texas to CA(and presumably south into Mexico).

The markings on your ladybird actually match a illustration from Gordon of C. m. lengi with reduced maculation, better than it matches the illustration of C. m. fuscilabris. But that's why subspecies are not exactly a "real" determination.
This one, also from Florida, is a better match for C. m. fuscilabris. It shows the small middle lateral black dot, matching the key and illustration from Gordon.

Thanks for the quick ID! I should have remembered about the antennae. It is a cold day in Southern Florida, and this guy was hanging out with another ladybug and a male orbweaver.

-Sean McCann
You can see some more of my photos at triatoma.blogspot.com