Taxonomic etymology - How were these names formed?

Does anyone know of a good resource where one can find out about the etymology behind things like genus? Specifically the instance that prompted my question is the ground beetle genus "Calosoma." I've been studying Greek a bit lately and was wondering if this name was derived from Greek, or from Latin which was in turn influenced by the Greek. Kalos = fair, beautiful; soma = body. Of course, this could be totally wrong, but I was curious nevertheless, to find out where the name came from, either way. it seems an interesting topic in general, too, so if there is a resource where one might peruse such info, I'd love to find it.

So that brings me to my reason for posting here: Has anyone seen this sort of info anywhere, either in a book or online?

Thanks!

Scott