Noctave
The piece
In Act III of the opera The Tale of Tsar Saltan, first staged in 1900, Prince Gvidon is turned into a bumblebee by the Swan Princess, and an orchestral interlude depicts his flight. What you play here is a piano reduction of that interlude, not one of the concert arrangements such as those by Rachmaninoff or Cziffra. The repeat of bars 75 to 85, missing from the original transcription, has been restored from the vocal score published by Bessel.
The whole piece is a perpetual motion of chromatic sixteenth notes, almost entirely in the right hand, at nearly ten notes per second. Chromaticism is the key: there is no key signature, yet close to a third of the notes carry an accidental. Use the standard chromatic fingering, middle finger on the black keys and thumb on the white, and never change it: at this speed your fingers must know the path by heart. The left hand mostly plays short, detached chords that must land exactly without slowing the right; a few of them exceed the octave. Midway, the chromatic line drops into the lower staff, where the score marks which hand takes it: make that hand-off seamless.