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Photo#1202425
Timema cristinae? - Timema cristinae - male

Timema cristinae? - Timema cristinae - Male
Los Padres National Forest, Ventura County, California, USA
March 19, 2016
Though the host plant of T. cristinae is Ceanothus, I only found these guys on Fraxinus dipetala (ash), on which they were fairly common.

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Timema cristinae? - Timema cristinae - male Timema cristinae? - Timema cristinae - male Timema cristinae? - Timema cristinae - male

Moved
Moved from Timema.

T. cristinae
As you surmised, coastal mountain location adjacent to Santa Barbara Co. suggests T. cristinae.

And the clear, detailed, image of male terminalia allows confirmation of that ID, from the good match with T. cristinae (e.g. with distinctive widening of the sinistral (=left) cercus near it's base, etc.).

If one were to ignore range considerations, color & terminalia look similar to T. californicum, but it's sinistral cercus is of more-or-less uniform girth...all the way to the base.

Apparently it was also found on Fraxinus dipetala near San Marcos Pass on April 2 of this year.

Host
I think their host range is broader than that reported in literature. I had T. cristinae on ceanothus, mountain mahogany, and coast live oak today. I saw them feeding on all three species. I also had a pair on holly-leafed redberry, but didn't observe actual feeding.

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