I made several micrographs of palps as a part of my thesis while attending UTA. This is the ventral side of the tarsus of P. audax's pedipalp (the part that contacts the female during copulation). The smooth, wrinkly tissues are the inflatable hematadoche - they will expand out and change shape during mating. At the bottom end of these is a pointy structure - this is the embolus. The salticid embolus is very short compared to some other groups, like the linyphiids, etc.