Looks to be perfectly matched to Jerry Powell images at MPG here http://mothphotographersgroup.msstate.edu/species.php?hodges=985

Quite large Ethmia. Peppered gray throughout cells FW with narrow black line from base to apex, making a jag one-third from base, then interrupted by white colored small gap two-thirds from base.

This species abundant at metal halide light sheet this evening.

Essig Museum of Entomology California Moth Specimens Database lists five records of this species, including a Nov 5 record Ventura County https://essigdb.berkeley.edu/cgi/calmoth_query?table=calmoth&query_src=eme_calmoth&rel-genus=contains&where-genus=ethmia&rel-species=contains&where-species=macneilli&rel-location=contains&where-location=&rel-county=equals&where-county=any&rel-collector=contains&where-collector=&rel-specimen_loc=equals&where-specimen_loc=any&rel-identified_by=contains&where-identified_by=&orderby=genus%2Cspecies&Search=Search