Like the other post said, they don't have as much ventral checkering and they also tend to grow larger.

Actually, meahllmorum don't get as big as other western guttata type rats. The biggest of the guttata group in my experience are the slowinski from eastern Texas. I have seen a lot of those over 5 feet and I caught a 6 footer once (73" actually).

This big "slowinski" from east Texas was 5 feet long and meaner than dirt -



The south Texas ones (which would be the true meahllmorum) are lighter colored generally and rarely exceed 4 feet. They are also more slender than East Texas snakes. I don't have a good photo of one (even though they are abundant), but check Gus Renfro's recent post on the field herping forum.
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Chris Harrison
San Antonio, Texas

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