At 1130 eastern time, a Beech F-35 Bonanza experienced an airframe vibration while descending out of 3,500 feet 25 miles west of Hollywood North Perry Airport. The pilot slowed the airplane and landed without further incident. The pilot said he was descending from 3,500 feet at 180 knots indicated when he felt the tail flutter. He reduced power, slowed the airplane and landed successfully. A post-landing inspection found the empennage aft of the rear bulkhead had substantial wrinkling near the horizontal stabilizers.