I love these little things. The first time I saw one, I was so shocked. I thought, “Why is there a baby scorpion with no tail climbing my tree in Cincinnati of all places?”. They are not insects, but arachnids and they are mighty hard to spot unless you are specifically looking for them. Because if you aren’t looking close enough, they look like reddish dots moving around. I found this one under a rock in my backyard.
They have a few common traits with spiders such as: injecting venom from one of their claws to immobilize their prey, spraying a corrosive fluid on the victim to aid in digestion, and spinning silk from their jaws (spiders do it from the other end).
These are beneficial because they feed on clothes moth larvae, carpet beetle larvae, booklice, ants, mites, and small flies.