breeding black mexican king snake to cali king?

[wilomn]

Nope. They are different sub-species. Lampropeltis getula california and Lampropeltic getula nigrita....thus making them an integrade. A hybrid would be if you crossed say L.g.nigrita X Pantherophis guttattus guttattus, aka mexican black king x cornsnake.

Cool. thanks for clearing that up.