Figure 1. FMRFamide-like immunoreactivity (FLI) in the brain of Phormia regina. A) Anterior view of the brain showing FLI throughout the regions of the brain, including cells in the optic lobes, protocerebrum, and the subesophageal ganglion (SOG). FLI is shown in nerve processes running down the cervical connective (CN) to the thoracico-abdominal ganglion. B) Posterior view of the brain showing FLI in cells of the protocerebrum, including median neurosecretory cells in the pars intercerebralis (PI) and subesophageal ganglion. cervical connective processes originate from cells in the subesophageal ganglion. OL, optic lobe; E, esophagus.