The ornamental design for an electricguitar, as shown and described.
FIG. 1 is a front elevational view of an electric guitar showing our new design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a left side elevational view thereof; and,
FIG. 7 is a perspective view thereof.
The broken lines are included for the purpose of illustrating the environmental structure and form no part of the claimed design. The dash-dot line represents the boundary of the claimed design.