Figure 3. FMRFamide-like immunoreactivity (FLI) in the thoracico-abdominal ganglion (TAG) and cervical connective (CN) of Phormia regina. A) Dorsal aspect of the CN and thoracico-abdominal ganglion of P. regina. Processes arise from cells in the subesophageal ganglion, run down the cervical connective, and form an anastomosing neurohemal plexus on the dorsum of the thoracico-abdominal ganglion. B) Ventral aspect of the cervical connective and thoracico-abdominal ganglion of P. regina. Paired FLI cells and cell clusters are visible in each neuromere of the thoracico-abdominal ganglion. Processes can be seen running down the cervical connective to the thoracico-abdominal ganglion. SOG, subesophageal ganglion; E, esophagus.