The four pairs of legs each comprise 7 segments, namely the coxa, trochanter, femur, patella, tibia, basitarsus and telotarsus. Dorsally the metosoma has ridges and keels with the fifth segment always the longest and containing sensory setaeous bristles. The anus is situated ventrally just below the point it meets the telson. The pectines situated ventrally on the second mesosoma, are comb-like organs found only in scorpions. Unique to scorpions is that the cuticle fluoresces under ultraviolet light aiding in the collection and observation of these interesting animals at night.
Scorpions are sexually dimorphic.
The females are usually larger and more robust than males while the male usually has a longer tail. The pectines are smaller with shorter and straighter teeth in the females. The chela is often longer and more slender in the male.