NEW YORK — Bare legs have had their day in the sun — now it’s time to dress them up again. The operative words: sheer and sexy. In fact, it isn’t hard to imagine Catherine Deneuve in “Belle de Jour” slinking up to her hotel room in spring’s scintillating hosiery. Here, photographed at the Hotel Elysee, Hue’s racy seamed stockings. Nanette Lepore skirt. For more, see pages 4 and 5.