Collapsible lamp shade
FIG. 1 is a perspective view of one embodiment of an ornamental design for a collapsible lamp shade in accordance with the present invention; 
     FIG. 2 is a side view of the embodiment illustrated in FIG. 1; 
     FIG. 3 is a top plan view thereof; 
     FIG. 4 is a bottom plan view thereof; 
     FIG. 5 is a perspective view of a second embodiment of an ornamental design for a collapsible lamp shade in accordance with the present invention. 
     FIG. 6 is a perspective view of a third embodiment of an ornamental design in accordance with the present invention; 
     FIG. 7 is a perspective view of a fourth embodiment of an ornamental design in accordance with the present invention; and 
     FIG. 8 is a perspective view of a fifth embodiment of an ornamental design in accordance with the present invention.