The fact that neither one was interested in the other was my primary observation. Since both are predators my immediate thought was that they both knew the others capabilities and were displaying a mutual respect for each other.

I have observed this same behavior between Branch tip spiders and newly hatched Carolina mantids. They just leave each other alone.

Most sources, including Arnett "American Insects" (1990), state that leaf-footed bugs are plant sap feeders.
However Borror & White "A Field Guide to the Insects" (1970) and some internet sources, mention that there are some predatory coreids.

An apparently up-to-date statement is: "A few sources, including field guides and and websites, mention that some leaf-footed bugs are predatory, but modern experts believe that this is probably not true" on the University of Kentucky coreid webpages.

Hence it would be awesome if predation by a leaf-footed bug was recorded.

But yes, the avoidance behavior you observed is still intriguing, as the Jumping Spider and the Coreid are comparable in size, and telling predatory assassin bugs apart from leaf-footed bugs can be tricky for humans, without counting the number of proboscis segments, which might be hard for arachnids ...

My focus is nature through the camera lens … I don't specialize in any particular species, I accept them all as we cross paths. I am as happy with an insect or arachnid as I am with the largest rarest mammals, reptiles, or any other. I love them all. I started using Bug Guide as my sole resourse to ID insects and arachnids that I would use for photo contests. By the way, insects have been very kind to me and have been my best subjects in those contests. My greatest winner was the face of a Wolf spider! Many of my finalists have been the Great golden digger wasp and Green lynx spider.

I am in awe and truly inspired by your love of nature and your encyclopedic knowledge of such subjects that I am only capable of guessing at. When I am confronted with a case such as this, I observe details and try to see what's taking place. It was truly strange to me that a single arachnid was not interested in any of the 31 leaf-footed bugs, and vice versa. And my reason for calling it "predatory" would have been from something that I have read during my research. I really have no idea if they are or not, I merely assumed that.

I have crossed paths with many, many leaf-footed bugs in my area and have never (yet) witnessed a display of predation. But if I do, I will certainly record it and share it!!

I am self-schooled in the bush and learn a lot of stuff about a lot of things, but I never learn everything there is to know about any of them. Patient, attentive, detailed observations told me long ago that you can read all that is written about a particular animal and charge out into the brush with your chest out thinking you know all there is to know about this, that, or the other. Pretty soon they will surprisingly show you a new trick!!

Here is the similarity with the Branch tip spider and Carolina mantids:

http://bugguide.net/node/view/264918

I sincerely appreciate your comments and your deep love of nature. Be safe in your travels and enjoy nature at its finest!

We have a lot in common.

Safe travels & boundless enjoyment to you too !