Interesting FW shape rather pointed apex perhaps with a slight scallop in outer margin. FW uniform dark tan striated, possibly darker lines between veins distal. Otherwise unmarked. Compares well to MPG images here http://mothphotographersgroup.msstate.edu/species.php?hodges=9445

Definitely not Mammifrontia rileyi which is smaller and has a May--June flight period here in San Diego.