Mating, apparently shortly after female emerged (?) from the bed of mosses. This is located in a damp area on the north side of a building--there were several of these beetles buzzing about. A good example, I think, of the very low angle one can obtain with a compact digital camera--these photos were taken with a Nikon Coolpix 4500, turned to a flat configuration and placed right on the ground. (Unfortunately Nikon does not make this camera any longer--it is perfect for this sort of thing.) Male later went off on his own, antennae deployed, to seek more females--see linked image.