MR. NEWPORT ON THE NERVOUS SYSTEM OF THE SPHINX LIGUSTRI. 421 



d. The Stomach. 



e. The small intestines. 



f. The biliary vessels. 



g. The caecum. 



h. The colon and rectum. 

 i. The testis. 

 Fig. 14. CEsophageal portion of the alimentary canal in larva of Sphinx, exhibiting 

 the constrictor (h) muscles of the pharynx (c?), aortal portion of the dorsal 

 vessel («, b), cerebral ganglia, and optic nerves developed from them (c) ; 

 anterior lateral ganglia {e,f) and ganglion and nerve of the vagus in situ, 

 seen from above. 

 Fig. 15. Internal view of part of the proboscis of the perfect insect. 

 a. The transverse muscles. 

 h. The groove, 

 c. The oesophagus. 

 Fig. 16. Longitudinal and transverse muscles of the proboscis of Sphinx. 

 a. Flexors. 



h. Longitudinal extensors. 

 c. Transverse extensors. 

 Fig. 17. Lateral view of four joints of the antennae Sphinx Elpenor, Linn. 

 Fig. 18. View of the articulating surface of the antenna. 



Plates XV. and XVI. 



Fig. 19. Tracheae of the proboscis, showing their relative situation with that of the 

 nerves. Letters « to e as in fig. 10. 

 y, h. The tracheae. 



g. Their united origin. 

 Figg. 20. to 30. Plates XV. and XVI. Exhibit the gradual change and development 

 of the nervous system of Papilio urticce, magnified 12 diameters. The 

 figures and letters refer as in figg. 1. and 2. of Sphinx ligustri. 

 Fig. 31 . Posterior view of the cerebral and oesophageal ganglia oi Papilio urticce, L., 

 as seen during the change at forty-eight hours after change to the pupa 

 state. 

 B. The optic nerves, developing and showing the sacculi of fibres and deve- 

 lopment of the choroid membrane (c). 

 Fig. 32. One of the abdominal ganglia of P. urticce, viewed from below by means 

 of transmitted light, and showing the two inclosed approximated nodules 

 of grey matter, and also the transverse nerves, as seen at twenty-four 

 hours after change to the pupa state, magnified 30 diameters ; the trans- 

 verse nerves (c), the spinal cords (/), the compound symmetrical nerves 

 {h)j the small diagonal nerves (g). 



MDCCCXXXIV. 3 I 



