Phoenix, Maricopa County, Arizona
Coordinates: 33.407168, -111.987508
Elevation: 1,123 ft
November 13, 2019
Size: 9 mm
It was abundant on desert milkweed, Asclepias subulata
Rebecca Senior, who kindly showed me these insects on the desert milkweeds, told me that she thought they were Smoketree Sharpshooters, and identified the host plant
Confirmed by Salvador Vitanza and Kyle Kittelberger