268 Annals Entomological Society of America  [Vol. V, 
aspect of the supracesophageal ganglion and connects with the 
ganglion by means of a short stub and then continues ventrad 
into the head for a considerable distance. 
Lateral Commissure.—The lateral commissure (J. c.) is a 
short nerve that arises from the middle of the dorsal surface of 
the anterior lateral ganglion and unites with a larger ganglion 
dorsad and caudad of the anterior lateral ganglion. This 
commissure gives rise to a nerve which extends ventrad. 
Posterior Lateral Ganglion—The posterior lateral ganglion 
(p. 1. g). is larger than the anterior lateral ganglion and is 
located dorsad and somewhat caudad of it. It likewise gives 
rise to several nerves at its caudal and cephalic ends. 
EXPLANATION OF PLATES. 
PLATE XIX. 
Fig. 1. Lateral aspect of an entire larva of Protoparce carolina. 
Fig. 2.. Cephalic aspect of the head. 
Fig. 3. Ventral aspect of the head. 
Fig. 4. Ventral aspect of an abdominal proleg. 
Fig. 5. Cephalic aspect of a thoracic leg. 
Fig. 6. Spiracle, enlarged. 
Fig. 7. <A larva opened from the dorsal aspect showing the digestive tract. On 
the left the salivary glands and the trachee are represented which 
enter the canal, while on the right the malphigian tubules and silk 
glands are shown. 
Fig. 8. Dorsal aspect of the pharynx, enlarged. 
Fig. 9. Enlarged ventral aspect of the region of the alimentary canal, showing 
where the bladder: of the malphigian tubule is attached. 
Fig. 10. Cells of the adipose tissue, enlarged. 
PLATE XX. 
Fig. 11. A larva opened from the ventral aspect showing the respiratory system. 
Fig. 12. A larva opened from the ventral aspect showing the muscular system, 
circulatory system, reproductive organs, and wing buds. 
PLATE X XI. 
Fig. 13. A larva opened from the dorsal aspect showing the entire nervous 
system. 
Fig. 14. Dorsal aspect of the seventh and eighth abdominal ganglia. 
Fig. 15. Dorsal aspect of the first abdominal ganglion. 
Fig. 16. Dorsal aspect of the metathoracic ganglion. 
Fig. 17. Dorsal aspect of the mesothoracic ganglion (7. 2g), prothoracic ganglion 
(T. 1g), subcesophageal ganglion (H. 2g), and the supracesophageal 
ganglion (H. 1g). 
Fig. 18. Lateral aspect of the pharynx showing the nerves of the supracesoph- 
ageal and subcesophageal ganglia. 
