Bulloch is Scotland's most-capped hooker

The 30-year-old hooker made 75 appearances for Scotland, leading the team on 11 occasions, and also went on two Lions tours.

"This has been a difficult decision as I have always regarded selection for my country as a huge honour," said Bulloch, who joined Leeds this summer.

"It's about what's best for me at this stage of my rugby career and in my personal life."

Bulloch also led the Lions midweek side three times on the recent tour of New Zealand.

"The physical commitment to play international rugby is widely recognised but there is also a huge time commitment and you cannot compromise when it comes to international rugby. It has to be everything.

"During my career I have not had many injuries and, in one guise or another, I have spent every summer away playing rugby since 1994, often in the intense environment of the Test arena.

"I have joined Leeds Tykes on a two year contract and I am looking forward to playing club rugby. International rugby is now a closed chapter for me."