I agree that this moth stands out from the other images posted of H. californica at BG, MPG, PNW Moths and BOLD. However, without a MONA Fascicle that discusses Homoglaea it is difficult for me to compare these species. The best info I can find is at PNW Moths. Although PNW Moths reports that the ST line of californica can rarely be preceded by ill-defined black spots, its range does not appear to extend to Arizona. According to BOLD, H. variegata is certainly possible at this location, but this moth does not look like the BOLD images of that species. A review of the other Homoglaea species covered by PNW Moths has me thinking that H. carbonaria might be a better fit. I would consider moving this to carbonaria if it had not been identified by Cliff Ferris at californica. Cliff is a respected expert and he would have to be consulted and concur before moving. Unfortunately, I do not have Cliff's contact info.