Phileurus valgus.
 
 
 
Size: approx. 30-40 mm. Photo: 06/08/15, 9 pm.


Phileurus belongs to the subfamily of Rhinoceros Beetles and yes, it is fairly big and impressive. In the US, the genus has two species (P. truncatus and P. valgus) which both exist in Florida.  
 
 
bug guide (this photo):
http://bugguide.net/node/view/1080819