I just searched San Diego and Riverside Co. home pages and can't find anything mentioning Thamnophis marcianus - Checekered Garter. Plenty about Thamnophis hammondii (Two-Striped Garter Snake).
Help me out here Richard. Do you have a link to the code section because I'm just not seeing/finding it.
Can you send me a PM as this thread has gotten far off the tracks