Connacht 20
A try four minutes from time prevented Connacht from getting a bonus point at Firhill after they had come back from a poor opening half hour.
Connacht trailed by 24-6 after 33 minutes but forced their way back and a Fionn Carr try left them 27-20 behind going into the closing stages.
Glasgow got in for three tries in the opening half. Ian Keatley, with a drop goal and a penalty, lifted the siege and Connacht finished the half strongly with two more penalties leaving it 24-12 at the break.
Another Keatley penalty reduced the margin to 24-15 after 45 minutes and it seemed it was game on when Frank Murphy intercepted a pass and sent Carr away with seven minutes left for his fourth try of this season’s Magners League and his eighth of the season.
But Glasgow secured a bonus point in the closing stages with their fourth try.