I think this is a young Cicada - Neocicada hieroglyphica

Neocicada hieroglyphica (f. johannis)

A common cicada in parts of the Southeast. Florida populations usu. have less black pigmentation and belong to the taxon N. hieroglyphica johannis.

… Bill Reynolds, 25 September, 2009 - 10:19am

Moved

Moved from Hieroglyphic Cicada.

… John R. Maxwell, 7 August, 2009 - 1:13am

Neocicada hieroglyphica f. johannis

Neocicada hieroglyphica f. johannis
Populations of this species from peninsular Florida belong to the taxon Neocicada hieroglyphica f. johannis.

NOTE: The "race" johannis replaces the nominate form "hieroglyphica" through out much of Florida and occupies the majority of the Florida peninsula. It is typically characterized by reduced mesonotal patterning and less black. Individuals of johannis may range in color from light tan, mint green, to brownish and any degree of varying combinations.

(Unusually dark individual - nice variant!)

… Bill Reynolds, 6 August, 2009 - 5:09pm

You are right, it's a cicada

and the winged, flying form is the imago (adult).

… margarethe brummermann, 16 December, 2007 - 3:03pm