The ornamental design for a litterreceptacle, as shown and described.
FIG. 1 is a perspective view of a first embodiment of the litter receptacle of the current design;
FIG. 2 is a front elevation view thereof, the rear elevation view being identical thereto;
FIG. 3 is a right side elevation view thereof; the left side elevation being identical thereto;
FIG. 4 is a top plan view thereof;
FIG. 5 is a perspective view of a second embodiment of the litter receptacle of the current design;
FIG. 6 is a front elevation view thereof, the rear elevation view being identical thereto; and,
FIG. 7 is a right side elevation view thereof, the left side elevation view being identical thereto; and the top plan view thereof being identical to the first embodiment.