Spilomyia fusca
Black with white markings. Almost wasp or bee like in appearance except the antennae make me believe it is a type of hover fly.
Rural SW Pennsylvania
Beautiful fly, funny that Susan mentioned Hornet, as this is a mimic of Dolichovespula maculata, the Bald-faced Hornet. see here:
http://bugguide.net/node/view/2890
Lat: 40.28, Long: -78.80
Spotted on Jul 12, 2012
Submitted on Aug 19, 2012