352 
Psyche 
[December 
Lubbock, J. On the Distribution of the Tracheae in Insects. 
Trans. Linn. Soc. Vol. XXIII, pp. 23-50, 4 pi. 1860. 
Packard, A. S. A Text-Book of Entomology. 1909. 
Peterson, A. The Anatomy of the Tomato-Worm Larva, 
Protoparce Carolina. Ann. Ent. Soc. America, Vol. 5, 
pp. 246-268, pi. XIX-XXI. 1912. 
Description of Plates 
Plate I 
Fig. 1. Sketch showing positions of spiracles. 
Fig. 2. Prothoracic spiracles viewed so that interior can 
be seen. 
Fig. 3. Trachea from spiracle with tracheal closing ap- 
paratus. 
Fig. 4. Main longitudinal trachea showing positions of 
sterno-tergal muscles. 
Fig. 5. Tracheae arising from first abdominal spiracle. 
Fig. 6. Tracheae arising from fourth abdominal spiracle. 
Fig. 7. Distribution of tracheae between prothoracic and 
second abdominal spiracles. 
Fig. 8. Transverse trachea in head, and ventral trans- 
verse trachea in prothorax. 
Fig. 9. Dorsal transverse tracheae between prothoracic 
spiracles : The Diamond. 
Figs. 10, 11, 12, 13. Trachea 1, and some of its variations. 
Plate II 
Fig. 14. Transverse trachea 2. 
Fig. 15. Trachea 3, showing relation to ganglion and 
muscles. 
