For 10 points, name these works for a high-pitched string instrument and orchestra.
Although it is not a string quartet, Bartok's early work of this type is in two movements thought to represent himself and Stefi Geyer. The premiere of one work of this type was ruined when Victor Novacek was asked to play instead of the dedicatee Willy Burmester; while describing that work, Donald Tovey famously said the final movement sounded like a (*) "polonaise for polar bears." Another one of these works was originally meant to be four movements, but the composer replaced the planned Scherzo with a "feeble Adagio." The soloist's entrance is accompanied by timpani in that D major work, a clear homage to an earlier work by Beethoven in the same key and genre. For 10 points, name these works for a high-pitched string instrument and orchestra.
Although it is not a string quartet, Bartok's early work of this type is in two movements thought to represent himself and Stefi Geyer.
violin concerto [prompt on just “concerto”]