OF THE SPHINX LIGUSTRI. 
395 
Description of the Plates. 
Plate XII. 
Fig. 1. — Nervous system of the larva of Sphinx ligustri, after it has acquired 
its full growth, and about two days previously to its change to the 
pupa state. Magnified two diameters and a half. 
а. The supposed brain or anterior nodules of the cord. 
1. The first ganglion situated in the head, or first segment beneath the 
nodules. 
2, 3, 4, 5. Ganglia of the trunk supplying nerves to the legs and wings. 
б, 7, 8, 9, 10, 11. Ganglia of the abdomen. 
a. The anterior lateral ganglia, h. Nerves to the mandibles, c. Second 
pair from the second ganglion given to the muscles of the neck. d. Third 
pair given to the first pair of legs. e. The plexus of transverse or superadded 
nerves from the second ganglion, f. Nerves to the first pair of wings, ori- 
ginating from two roots, one from the cord and one from the third ganglion, 
and connected also with the transverse plexus, g. Second pair of nerves 
from the third ganglion given to the second pair of legs. h. Transverse 
plexus from the third ganglion, i. Nerves to the second pair of wings ori- 
ginating like the first, from two roots, one from the cord and one from the 
fourth ganglion, and connected also with branches from the transverse plexus 
from the third, h. Second pair from the fourth ganglion given to the third 
pair of legs. 1. Nerves from the fifth ganglion, which, in the pupa, are 
those given to the posterior muscles of the trunk, m. Nerves from the 
sixth ganglion, which, in the pupa, are those of the anterior muscles of the 
abdomen, n. The last pair of nerves from the terminal ganglion given to 
the rectum and organs of generation. 
Fig. 2. — The anterior lobes or brain, with the first ganglion and nerves of the 
head. Magnified ten diameters. 
a. The lobes, b. The optic nerves, c. The nerves of the anterior late- 
ral ganglia, one attached to the posterior surface of the lobes, the other to 
the base of those to the antennse. d. Nerves for the antennae, e. The 
singular nerve which has hitherto been called the recurrent, but which 
