The 27-year-old Edinburgh Rugby hooker has taken over the responsibility from Kelly Brown, who is currently suffering with injury.
"This is a special day for Ross, who has been a key figure in our leadership group and our most consistent performer for some time," said coach Andy Robinson. "I firmly believe he is the man who will step up and lead from the front.
"That said, I'm really disappointed for Kelly Brown. I had asked him to be the captain late last week but unfortunately injury will deprive him of that honour and the chance to lead out his country for his 50th cap.
"I wish him a speedy recovery."
England make the trip to Murrayfield on Saturday week.