Identifying Beneficial Garden Insects

My general rule of thumb: the ladybug, praying mantis, and spider can stay. Grasshoppers, ants, aphids, beetles, slugs, snails, and any other bug I find on or under the leaves must go. I've also had termites in mulch before, and read that they won't harm plants so I left them and they moved on. This is about bugs, but as a side note, lizards and toads should also be welcomed in the garden.

By Ash