Upper Thumb Rock area, Pena Blanca Lake
Santa Cruz County, Arizona
Coordinates: 31.399643, -111.088896
Elevation: 3,869 ft
June 3, 2023
Size: 19 mm
19 mm body
Attracted to ultraviolet and mercury vapor lights
Determined by Jonathan Hoskins who said: “This is a fairly distinctive species with the two strong tubercles on the vertex.”