Explanation ok Pi.atk 2. 



Fig. I. Dorsal view of the head, showing the supia-oesophageal gangli:i and 



nerves. X 6. 



I. Supra-oesophageal ganglia. 2, Fj-ontal ganglion. 3, Clypeo-labral nerve. 

 4, Antennal nerve. n, Sensor branch. A, Motor branch, r, Integumentary 

 branch. 5, Optic nerves. 6. Oesophagus. 7, Aorta. S, Vagus nerve. 9. An- 

 tennal muscles. 



Fisr. II. Ventral view of the head, .showinsj the siib-oesophageal ganglitju and 

 nerves. X 6. 



I, Sub-oesophageal ganglion. 2, Gustatory nerve. 3, Labial nerve. 4, Man- 

 dibular nerve. 5, Maxillary nerve. 6, 7. 8. Unnamed nerves. 9. Commissure. 



0, Commissural nerve. 



Fig. 111. The maxilla with its three large nerves. Nen'e d^ fig. 11, not shown. 



X 7- 

 Fig. IV. Ventral aspect of the supra-oesophageal ganglia, the crura cerebri 



turned cephalad. X 15- 



1. Supra-oesopha^eal ganglia. 2, Frontal ganglion. 3, Crura cerebri. 4. 

 Tracheae. 5, Aorta. 6, Optic nerves. 7. Antennal nerve. 8, Clypeo-labral 

 nerve. 9, Vagus nerve, o. Vagus nerve. 



Fig. V. The mandible with its nerves. X 7- 



Fig. VI. The separation and dissection of the seven optic nerves. X 10. 



], Optic trunk of nerves. 2, Optic nerve. 3, Neurilemma. 

 Fig. VII. Showing principally the cross-nerve of the crura cerebri, the cephalad 



extremity of the sub-oesophageal ganglion having been dissected uwav. 



X 13. 



I, The sub-oesophageal ganglion. 2, Crura cerebri. 3. Cross nerve. 4. Com- 

 missure. 



