Spotting

This little jumper is most likely immature and that will make it difficult to identify further. They change colors as they get older. Quick little fellow.

Thanks! I thought it was an ant with a big head running across my arm... to the naked eye, it just looked like a tiny sugar ant with macroencephaly.
:-)
Glad I had my macro lens in my pocket.

That is the tiniest of jumping spiders! Wow!