It sounds like a brown snake

But could also be an earthsnake. Here is a good website for you to check out: www.herpsoftexas.org/view/snakes Also I would check your state regs. I believe you are required to have a hunting license and a reptile stamp to legally collect in Texas. Here is a caresheet if you decide to keep them: www.repticzone.com/caresheets/1280.html

Josh