Piezodorus guildinii (Red-banded Stink Bug).
Photo: 05/10/16, 9 pm.

My wife discovered this one on my T-shirt (after an unsuccessful trip to our porch lights) and skillfully transferred it to a kitchen towel. The Red-banded Stink Bug is native to South and Central America, and the southern US. It is apparently quite common in Florida and sometimes considered a pest as it feeds on seeds of legumes such as soybeans and alfalfa. Five to eight generations can occur in a single growing season. 
bug guide (this photo):