The lock forward and Saracens centre Duncan Taylor - who requires shoulder surgery - are expected to be unavailable for up to three months, which rules them out of Scotland's four warm-up games ahead of the Rugby World Cup 2015.
Edinburgh Rugby duo Dougie Fife and Ben Toolis were today added to Scotland’s extended training squad.
Head coach Vern Cotter selected 46 players for the training squad earlier this month and must cut that down to 31 by the end of August.