MR. NEWPORT ON THE NERVOUS SYSTEM OF THE SPHINX LIGUSTRI. 419 



p, p, p, p,p. Extremities of the respiratory nerves, which, after passing over the longitu- 

 dinal abdominal muscles, divide and pass on each side of the spiracles 

 q. Dorsal longitudinal muscles. 

 r. Abdominal longitudinal muscles. 

 s. Duplicatures of the segments. 

 t. Division between thorax and abdomen. 

 u. Between third and fourth segments. 

 V. Between the first and second segments. 

 w. Anterior spiracles. 

 Fig. 3. The supra-OBsophageal ganglia and nerves : magnified fifteen diameters. 



A. Cerebral ganglia. 



B. Optic nerves developing. 

 c. Nerves of connexion. 



D. Nerves of the antennae. 



E. The vagus nerve. 



a. Anterior lateral ganglia. 



h. Nerves which connect them with the cerebral ganglia. 



c. With the first respiratory or transverse nerves. 



d. With the antennae. 



g. With the vagus or pneumogastric. 



e. The ganglion and nerve of the vagus. 



f. Its trunk after passing beneath the cerebral ganglia. 



h, h, h. Branches given to the aortal portion of the dorsal vessel, or heart, which 

 runs immediately above the vagus. 

 i. Division of the vagus at the cardiac extremity of the stomach. 

 k, k. Branches given to the oesophagus, along which the vagus runs. 

 Figg. 4 and 5. Nerves and ganglia of the head in the larva and perfect state of the 

 common Blood Beetle, Chrysomela tenebricosa,ljiis(^. Fig. 4. Larva. 

 Fig. 5. Perfect insect. 

 A. Cerebral ganglia in the larva, scarcely at all united, and exactly as seen 

 in the early stages of the larva in the Bee and Sphinx. 



A. Cerebral ganglia. 



B. Optic nerves. 



c. Anterior lateral ganglia. 



D. First suboesophageal ganglion. 



a. The two nerves or origins of the vagus, forming between them the ganglion. 



b. A ganglionic enlargement on the trunk of the nerve. 



c. Nerves given to the sides of pharynx and oesophagus. 



d. A division of the vagus at the commencement of the stomach, as in the 



larva of the Sphinx, 

 c, e. The pharyngeal and nerves of taste. 



