Another one of my beetles... this one is the Pinacate Beetle which is also known as the "desert stink beetle" or "stink bug". It produces quinone (a noxious smelling liquid derived from quinic acid), and stands on its head, rear end in the air, to spray it. It is endemic to western North America (California). The name “pinacate” is Spanish, derived from the Aztec name for the insect, “pinacatl”, which translates as "black beetle". It can range in size from about 10 to 50 mm (0.39 to 1.97 in) in length and are black in color with some having a reddish tint on their abdomen.They are typically found in the arid desert regions of their range but can also be found in forests and grasslands. All species in the Eleodes family are flightless because their elytra (shell halves) are fused together and their second pair of wings is very reduced and have become functionless in the course of evolution.