Revision and cladistic analysis of Pholcus and closely related taxa (Araneae, Pholcidae)By Bernhard A. Huber
A really beautiful revision, it even includes color images.
Dr. Huber has all of his publications, including this one, available for download (or on request) from his Pholcidae website: http://www.pholcidae.de/
(There isn't a separate URL for each page at his site, so I can only direct you to the main page. It's easy to find everything once you're there, though.)