Mud Snake is taken:
Farancia abacura (Holbrook, 1836) Mud Snake
Gr. abakos abacus and Gr. oura tail — Baird and Girard, 1852: "blueish black w/subquadrate red spots...abdomen red with transverse or alternating blueish black irregular spots."
OD Farancia abacura (Holbrook, 1836) - N. Amer. Herp., Ed. 1, Vol. 1, p. 119, pl. 23