The ornamental design for a lampshade, as shown and described.
FIG. 1 is a perspective view of a lampshade showing my new design;
FIG. 2 is a perspective view of the lampshade shown in an environment of use;
FIG. 3 is an exploded perspective view of the lampshade shown with both components removed for clarity of disclosure;
FIG. 4 is another exploded perspective view thereof;
FIG. 5 is a front view thereof;
FIG. 6 is a rear view thereof;
FIG. 7 is a left side view thereof;
FIG. 8 is a right side view thereof;
FIG. 9 is a top plan view thereof; and,
FIG. 10 is a bottom plan view thereof.
The broken lines in the drawings depict portions of the lampshade that form no part of the claimed design. The additional broken lines shown in FIG. 2 depict environment that form no part thereof.