The ornamental design for the headlight portion of an agriculturaltractor, as shown and described.
FIG. 1 is a left side perspective view of the headlight portion of an agricultural tractor in accordance with the present invention;
FIG. 2 is a right front perspective view of the headlight portion of an agricultural tractor shown in FIG. 1;
FIG. 3 is a front view of the headlight portion of an agricultural tractor shown in FIG. 1;
FIG. 4 is a left front perspective view of a portion of the headlight portion of an agricultural tractor shown in FIG. 1; and,
FIG. 5 is a front side perspective view of the headlight portion of an agricultural tractor shown in FIG. 1. The part of the photograph shown in a coarse dot pattern and outlined in dashed lines illustrates a portion of the agricultural tractor that forms no part of the claimed design.