Male Pelegrina galathea Jumping Spider
Found this little (~4mm) jumper on a cactus this morning.
There was a large Phidippus audax female about a foot away on the same cactus, and she appeared to be eyeing him. I don't know if she was planning on pouncing and attacking him, but when I noticed she was doing the little "getting ready to pounce" dance that jumping spiders do, I decided to go ahead and try to save this little Pelgrina from being the Phidippus' next meal.
I probably shouldn't have interfered with the situation, but I haven't had a chance to photograph a Pelegrina male in quite a while.
The above photo isn't particularly spectacular, but it is the best I could get as this guy was quite active. Smaller jumpers tend to be quite hyper it seems, he was just bouncing around like crazy.
Taken at ~4.5:1 magnification with a reversed 28mm at f/8 on some extension tubes.