The Stanley Cup champion New York Islanders have played four straight games without winning and only Mike Bossy's goal at 7:08 of the third period enabled them to tie the Flyers last night in Philadelphia, 2-2.

Center Bryan Trottier set up the tying goal by bumping Darryl Sittler off the puck at the blueline.

Bob Bourne controlled the puck and passed to Bossy in the middle of the right circle. Bossy shot from a sharp angle at 7:08 and the puck went between Rick St. Croix's pads. It was Bossy's 15th goal this season.

The Islanders managed only three shots in the final period. Their goalie, Billy Smith, made a fine save on Lindsay Carson with less than two minutes remaining to save the tie.

The Islanders, 0-2-2 recently, are in their longest slump in nearly a year. They were 0-3-1 last Dec. 6-13.

They took a 1-0 lead at 17:20 of the first period when Bourne scored his fifth goal of the season. He took a pass out of a corner from Trottier, faked St. Croix out of the net and scored from in front of the left circle.