Comments & ID Thoughts
I suspect this is a salticidae/menemerus/semilimbatus/ - It did jump when captured in a net. The picture is bad, but: note the black cephalothorax - the "white mark" is actually the reflection of the camera's flash. True color: shiny black. The abdomen is indeed brownish. Note the white markings on the joints. Still the overall Gestalt looks like menemerus semilimbatus. I am amazed/aghast as to how much variation in coloration there is in an individual species. My best shot.