1912] © Anatomy of Tomato-worm Larva 267 
the cephalic and dorsal surface of the pharynx and oesophagus, 
it gives rise to paired and unpaired laterad extending branches 
which innervate the cephalic and dorsal parts of the pharynx 
and cesophagus respectively and probably also the aorta. As 
the recurrent nerve approaches the caudal end of the cesopha- 
gus, it divides into two branches, which pass around the side 
of the cesophagus. 
Vagus Ganglion (Fig. 7, v. g.).—At the point of the forking 
of the recurrent nerve near the ventriculus, a minute ganglion 
exists, the vagus ganglion (v. g.). 
Stomogastric Nerves (Fig. 7, st.) —The branches that proceed 
from the vagus ganglion on each side are the stomogastric 
nerves (st). These nerves curve laterad around the oesophagus 
_ and innervate its caudal portion. 
Paired Sympathetic System (Fig. 17 and 18).—On each side 
of the pharynx dorsad of the supracesophageal ganglion, a 
sympathetic system exists, composed of two distinct nerves 
and two ganglia. 
Lateral Nerve.—Just dorsad and slightly mesad of the large 
trachea that enters the supracespohageal ganglion is the point 
of origin of the very small lateral nerve (J). This nerve con- 
tinues dorsad and slightly caudad till it ends in an enlarged, 
irregular, ovate-shaped ganglion on the lateral aspect of the 
pharynx cephalad of the subcesophageal ganglion. Running 
parallel with this nerve is a minute treachea which resembles a 
nerve very closely and is easily mistaken for one. This trachea 
is not indicated in Fig. 18. Often the lateral nerve, before 
entering the anterior, lateral ganglion, gives rise to a small 
branch which either connects directly with the ganglion or 
with the fronto-lateral nerve. 
Anterior Lateral Ganglion.—The ganglion in which the lat- 
eral nerve ends, is the anterior lateral ganglion (a. /. g.). This 
ganglion gives rise on its caudal and cephalic ends to two or 
three nerves of various sizes which extend caudad between the 
muscles of the pharynx. On its dorsal margin, it gives rise toa 
lateral commissure (/. c.) which connects with the posterior lat- 
eral ganglion. 
Fronto-Lateral Nerve -—The fronto-lateral nerve (f. /.) arises 
from the cephalic end of the anterior lateral ganglion adjacent 
to and cephalad of the point where the lateral nerve enters. The 
fronto-lateral nerve continues ventrad to the caudo-lateral 
