If I had to I would bet my money that that is a hybrid since the saddles match up and so does the white tipping on the scales also the grayish background are all common of Obsoleta Spilodes, Rossalleni, Quadrivittata, and kin. more than Guttata but normals can vary, I also have seen this cross before and if looked alot like this one so that also leads me to believe something more than Guttata to be involved, I would like an opinion from Kathy Love since in her book she mentions Grey Rat x Corn mixes.