Hold the presses......there is a variety of CAs that is small. I did a lot of research when I worked on correcting problems at our condo in Florida. At the time, the info on U of Fla website was specific for Florida CAs and those were not causing damage but were nesting in already damaged structures and rotten or dead limbs outdoors. This link has more info and includes a newer CA with limited occurrence in FL but more in other southern states. Good idea for the OP to catch a few of the ants and take them to local extension service or to find info about ants in his locale. Most extension services have thorough info about pests, including current methods of elimination. Here is the link again: