lateralis
They probably are much more successful in the warmer states when it comes to an infestation. I don't think they would make it very far in the Chicagoland area if any escaped. The summers are hot and humid but the winters are just downright cold. You have to be a particularly special bug to survive -20 degree windchills.
I can respect the opinion of anyone who would have reservations on keeping these roaches, because you do have to be careful. It'll take one time to knock a tub over and have 1000's of roaches scattering all across the floor.
I personally have been keeping lateralis roaches for months now and i love them. Very easy to take care of (must easier than crickets, and you'll have almost no deaths in the colony), no cleaning, no stench. BINGO!