Derobrachus hovorei
Canoa Ranch Rest Area (northbound) Hwy 19
Pima County, Arizona
Coordinates: 31.765774, -111.034543
Elevation: 2,998 ft
July 29, 2019
Size: 55 mm to base of jaws
On the floor near an exterior light
Determined by Salvador Vitanza
Confirmed by Steve Lingafelter