These are images of a Picture-winged Fly that I think is an adult male in the genus Euxesta
. I'm including extra views to show certain features, even though most of them are blurry. The plant flower is a non-native Cardon Cactus
, Pachycereus pringlei
NOTE: This is the best view that I have of the side of his head and thorax.
Here is the image of a similar male, from Texas, for comparison: ♂