The basic bones with a bow, skeleton archers return for their third go 'round in the Diablo series, and they are much as they've ever been. A humanoid skeleton with a bow and a relatively slow firing rate. They are not dangerous one on one, but a pack of them can be pretty nasty, especially against low armor or stationary targets.
In Diablo III they usually spawn with Skeletal Shieldman, firing from the relatively safety they find behind their blocking brethren. They may also appear with Skeletal Shaman. It's not yet known if the shaman can cast any sort of buffs on the archers.
Media
See screenshots and concept art of the Skeletal Archer in the Image Gallery.
Using shieldmen for protection.