The first pair is much smaller and more slender than the others and is used as a second pair of antennae. It is sensory. Species of the Ammotrechidae do not have claws on this leg but the eremobatids do. This leg is not used for locomotion. The remaining legs get progressively larger posteriorly and are used for locomotion.
Wind scorpions are very fast runners, hence the name.
The legs of the posterior pair are equipped with T-shaped sensory racquets, or mallets, on their proximal articles. These are small plates attached by short stalks to the underside of the appendage. The appendages of the posterior three pairs have tarsal claws at their distal ends. The trochanters of the last legs are divided into two articles. The tarsi are subdivided into smaller articles.