Ruthven's are their own species(Lampropeltis ruthveni) and they have no subspecies so crossing them with anything would technically result in hybrids.

Ruthven's are closely related to the Mexican Kingsnake(Lampropeltis mexicana), which used to be considered 3 separate subspecies; namely the Thayer's Kingsnake(L. m. "thayeri", the Greer's Kingsnake(L. m. "greeri" and the San Luis Potosi Kingsnake(L. m. "mexicana".

Ruthven's are also closely related to the Gray Banded Kingsnake(Lampropeltis alterna).

I have kept and bred all of the above species(and former subspecies) since about 1994. I mean no offense but to suggest that the snakes posted by the OP are Ruthven's because they have a square jaw is an inaccurate assesment based on incomplete information and adds to the confusion.
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