what on earth are these bugs?

Click to make larger.From what I can tell, they might be assassin bugs - the little orange ones nymphs (which makes sense since with that huge cluster it appears eggs just hatched).

Assassin bugs are reportedly beneficial insects - eating other pests. Their only problem is that they also will bite humans and that's painful (and in some places, they carry Chagas disease ... which a friend of mine researches - it's a serious problem).

There are soooo many on my tomatillos today - that huge cluster of nymphs plus at least a dozen other large ones mulling about. Crazy.

Not sure what to do - let them be? Avoid my garden to avoid being bit?

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Dan Gill of LSU Ag Center ROCKS. Just got this email from him:

Although we use the term “bug” generically, there is actually a group of insects called the “true bugs.” The three insects in your photos are all members of the true bug Order.

In image 016 [the second photo above]the large brown bug is a leaf-footed bug (true bugs generally have the word bug in their name, but bug can also be applied to insects in other Orders, such as ladybug which is a beetle). Leaf-footed bugs are distinguished by the flat, leaf-shaped structure on their hind legs. They are destructive sucking insects that commonly damage tomatoes and citrus. Hard to control. Organically, a combination of pyrethrin and rotenone will help. Malathion and Sevin are used by non-organic gardeners. Or pick them off/collect them and destroy them.

The cluster of orange black-legged insects in image 016 is young assassin bugs. The assassin bug when mature will be larger and have black wings, an orange body and long black legs. They are beneficial predatory insects that should be left alone. You often see them lurking on plants (in groups when babies and individually as adults) looking/waiting for their next meal.

The bug in image 019 is also a true bug but is unknown to me. I looked at a variety of images on the Internet and don’t see anything quite like it. That may indicate that it is not a significant pest species.