The ornamental design for an adaptercollar for a syringe, as shown and described.
FIG. 1 is a perspective view of the adapter collar.
FIG. 2 is an enlarged perspective view of the adapter collar shown in FIG. 1 without the broken lines.
FIG. 3 is a front elevation view thereof, the rear elevation view being identical thereto.
FIG. 4 is a right side elevation view thereof, the left side elevation view being identical thereto.
FIG. 5 is a top plan view thereof.
FIG. 6 is a bottom plan view thereof; and,
FIG. 7 is a cross-sectional view thereof taken along line 7-7 of FIG. 5.
The broken lines showing parts of the adapter collar for a syringe are included for the purpose of illustrating use and environment and form no part of the claimed design.