Apodemia deserti - the Desert Metalmark. I found these flying in good numbers in a patch of their host Eriogonum inflatum at a turnout along Highway 74 in Palm Desert. June 9, 2019.
This female was ovipositing on the buds of the host inflatum a day earlier. June 8, 2019.
And here's the best shot I could get of the resulting egg. June 8, 2019.
Sometimes these are called Apodemia mejicanus deserti. This and all below are from Rock Corral, SBern Co., April 14, 2008.
Apodemia mejicanus deserti. Note the gray ground color of the wings.
Apodemia mejicanus deserti. These also have relatively large white macules compared to others in the mormo complex.
Ventral of Apodemia mejicanus deserti.