Abstract
The cephalic musculature involved in the feeding behavior of the larvae of Callopistria repleta was investigated anatomically in order to determine the muscles responsible for the mandibular movements. It was shown that the outward movement of the mandible was produced by the abductor while the inward movement by the adductor. Electromyogram recordings of these mucsles were carried out to determine their pattern of activity during mandibular movements. Electrical activities of the adductor during the inward movement of mandible were characterized by phasic bursts of firing.
