2. (Arthropoda: Insecta) a. In many, the inner lobe (elongate jaw-like structure) of the maxilla, located at the apex of the stipes. b. In Psocidae, represented by a hard elongate rod, slightly bifurcated at its free end and ensheathed by the galea, sometimes called the pick; similar modification to a stylet-like shape in Mallophaga.