Fig. 2. Surgical ablation of the metathoracic wing hinge stretch receptor (SR). The stretch receptor sensory terminals are embedded within the subalar membrane between the metathoracic epimeron and subalar sclerite. The stretch receptor axon initially passes through a nerve composed of only its axon. A tiny incision was made in the soft cuticle (represented by the box) just dorsal to the axillary cord, and the stretch receptor was ablated by cutting its peripheral nerve. Nerve IIINb1 contains the axons from a hair plate on the scutum, a chordotonal organ and the stretch receptor.