Abstract
Summary The frontal ganglion is conspicuously small, triangular and is connected to the brain by the frontal ganglion connective and the nervus connectivus. The hypocerebral ganglion is small, slightly elongated, completely hidden by the dorsally situated corpora cardiaca, and connected with the latter by a pair of nervus cardiostomatogastrici. The gastric nerve runs on the dorsal surface of the oesophagus to the crop where it terminates into a single, small ingluvial ganglion. The corpora cardiaca are free anteriorly, fused posteriorly and connected with the brain by a pair of nervus corporis cardiaci. The corpora allata are conspicuously large, opaque and situated posterior to the brain and suboesophageal ganglion. They are connected with the brain and suboesophageal ganglion by the nervi corporis allati I and II.
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