Tough one here boysNgirls.
There's 2 pics posted for this little guy and it's important to forget the pictures you've seen in the various milk and king books. The snake keys out precisely and is a snap if you read all the text in Williams systematics of Triangulum.
Notice the thread thin ring snout, narrow white, and heavily tipped red. This is a neonate, but as an adult will still be very similar. Forget the pics you've seen and good luck! As ususal, if you have something like this, drop me a line. Jeff