The ornamental design for a syringe with a cap, as shown and described.
FIG. 1 is a front elevational view of a syringe with a cap showing my new design, wherein the cap is made of translucent material and the syringe is made of transparent material;
FIG. 2 is a rear elevation view thereof;
FIG. 3 is a top plan view thereof; a bottom plan view being a mirror image;
FIG. 4 is a right side elevation view thereof;
FIG. 5 is a left side elevation view thereof;
FIG. 6 is a cross sectional view thereof taken along the line 6-6 in FIG. 1.
FIG. 7 is a left side perspective view thereof;
FIG. 8 is a right side perspective view thereof.
FIG. 9 is an enlarged left side perspective view thereof showing the cap part only;
FIG. 10 is an enlarged right side perspective view thereof showing the cap part only; and,
FIG. 11 is a referential enlarged cross sectional view thereof showing the cap part and a tip only.