Stenhousemuir slumped to ninth in the Scottish League One table after losing 2-1 to Airdrieonians.The hosts went ahead in the 32nd minute when Bryan Prunty fired his 11th goal of the campaign past Stenhousemuir goalkeeper Greg Fleming from close range.The Diamonds continued to attack as the first half drew to a close, but they could not add to their lead before the interval.Airdrieonians made it 2-0 in the 65th minute when Prunty scored from the penalty spot after Gregor Fotheringham had fouled Chris O'Neil in the box.The visitors pulled a goal back in the 81st minute when Martin Grehan found the bottom corner of Andy McNeil's net before Ryan Millar saw red five minutes later.