Hydrophilus insularis
Pena Blanca Lake, Santa Cruz County, Arizona
Coordinates: 31.399678, -111.088889
Elevation: 3,870 ft
September 15, 2020
Size: 38 mm
Attracted to mercury vapor and ultraviolet lights
Determined by Matthew Pintar
Hindwing
FAMILY HYDROPHILIDAE (Water Scavenger Beetles)