It seems like I should put this question in the Italian Royal Families message board, but Roberto I of Parma's thread is located here. I found this image on flickr. It has been tagged as showing Princess Beatrice of Bourbon-Parma, Countess Lucchesi Palli (1879-1939). I'm skeptical. I haven't seen enough pictures of her, nor do i know enough about fashion, to be able to make a judgement on this picture.
http://www.flickr.com/photos/29482804@N06/3278235323/Even if does show a "Beatrice de Bourbon," could it be one of the following?
The Duchess of Ansola (nee Beatrice Harrington) - 1891-1979
Infanta Beatriz of Spain, Princess of Civitelli-Cesi - 1911-1986
Princess Beatrice of Bourbon, Princess of Roviano 1874-1961
Can anyone confirm the identity? Thanks for your help.