Title: Membership in the young cluster Trumpler 37
Abstract: Astrometric positions for 1387 stars and proper motions for a subset of 1135 stars brighter than V = 15 in a 1.5-deg field surrounding the young open cluster Trumpler 37 are presented. Membership probabilities are presented for those stars with measured proper motions, and 486 stars with probabilities of more than 80 percent are identified.