Take a look in this picture, if you look at the watermark on the photo, the letter 'R' is right where the V-shaped vent is.
Photo © Wu Weiqiang
If you look at this photo, follow the inside edge of the aileron forward, and you can kind of see it, looks like a dent in the wing next to the small vane.
Photo © John R. Beckman
It also appears on the L1011, on the right side. In this photo, the two V-shaped (more like > shaped since it is on the side) vents are below the pitot tubes.
Photo © John Gregory
What are these vents called? And more importantly, what are they used for?