99% sure its elaphe. I assume you mean a 'black rat snake' or a 'chicken snake' as is common in the southeast usa where I live. I do think its elaphe, though. It always used to irritate me when I'd see cornsnakes such as okeetee corns, elaphe guttata, being put into the same exaxt category as ratsnakes such as the elaphes. I might be totally wrong tho.