Pseudouroctonus reddelli is a species of scorpion found in the southwestern United States and northern Mexico. It belongs to the family Vaejovidae and is commonly known as the Arizona bark scorpion. It is a small to medium-sized scorpion, measuring around 2.5 to 3 inches in length, with a pale yellow to tan coloration. Pseudouroctonus reddelli is venomous and its sting can cause pain and discomfort, but it is not usually life-threatening to humans.