# File lib/ec2/right_ec2.rb, line 1045
    def describe_regions(list=[])
      link = generate_request("DescribeRegions",
                              hash_params('RegionName',list.to_a))
      request_cache_or_info :describe_regions, link,  QEc2DescribeRegionsParser, @@bench, list.blank?
    rescue Exception
      on_exception
    end