An other treasure from Bob Cowan's collection.
According to Bob:
[Disney and Leopold Stokowski were having trouble reaching an agreement for Stokowski's involvement in the film. Disney went ahead and started work on a "Bug Orchestra" that would play the music if an agreement with Stokowski was not reached. This is a Graphite and watercolor concept drawing of “Bug Orchestra.” A contract was signed and the "Bug Orchestra" did not appear in the film.]