arolium

arolium (noun; plural arolia; Greek arole, protection): (Arthropoda: Insecta) A medium lobe or pad-like cushion of the foot. a. Between the claws of Orthoptera. b. The base of each tarsal claw of Hemiptera. c. Between the tarsal claws and comprising part of the pretarsus of Hymenoptera

See also: pseudarolium.