OF THE SPHINX LIGUSTRI. 
397 
a. The cerebral nodules, b. The optic nerves, d. Nerves to the an¬ 
tennae. 1 . The first ganglion. 2 , 3, 4, 5. Ganglia and nerves of the trunk. 
6 to 11 . Abdominal ganglia. 
a. Anterior lateral ganglia, c. The remarkable anastomosis of the nerves 
which were originally the first and second pairs of the second ganglion in 
the larva, the first of which now arise from the cords. They supply the 
muscles of the collar, or true thorax of the pupa. d. The last pair from 
the second ganglion given to the first pair of legs. e. Posterior plexus of 
the transverse nerves from the second ganglion, f. Nerves to the first pair 
of wings, originating as before from the cord and ganglion, and given to 
the muscles of the wings in the anterior part of the trunk, g. Nerves of 
the second pair of legs. h. Plexus from the third ganglion, i. Nerves to 
the second pair of wings, originating and anastomosing as before, k. Second 
pair of nerves from the large or fourth ganglion, given to the third pair of 
legs. 1. Nerves which originally belonged to the fifth ganglion in the larva, 
and which are now the posterior nerves of the trunk, m. Nerves from the 
sixth ganglion given to the anterior muscles of the abdomen, n. Last pair 
of nerves from the terminal ganglion, o, o, o, o, o. Transverse plexus of the 
abdominal ganglia, much larger than in the larva, p, p, p, p, p. Those 
branches which ramify among the dorsal muscles and tracheae, but chiefly 
the latter, q, q, q, q, q. The superior branches of the transverse nerves 
from the abdominal ganglia, which, after uniting with a branch from the 
transverse plexus, pass upwards to the dorsal muscles, r, r, r, r, r. The infe¬ 
rior branches from the same, given to the layer of ventral muscles and inferior 
tracheae. 
Fig. 2.—The ganglia and nerves of the head and collar, or true thorax of the 
pupa, as existing in the month of March. Magnified ten diameters. 
In this figure the parts are represented in situ as seen when viewed from 
above. 
a, a. The cerebral lobes, b, b. The optic nerves, considerably enlarged 
at their base, where there is deposited upon the upper surface, and partly 
upon the lobes, the patch of dark pigment, c, c. The nerve, which at¬ 
tached at the base of the antennal nerve connects it with the largest of the 
anterior lateral ganglia, while the other, the lunated one, is attached by a 
3 F 
MDCCCXXXII. 
