JOUKNAJj OF ENTOMOLOGY AND ZOOLOGY 



41 



.---xs. 



Figure L Head and upper thorax of .1 jihonim iikiiiHx from above. This fifrure 

 is to show the position of the supra- and suliesophageal ganglia. The 

 small frontal ganglion is shown with its arched nerves. On the left 

 side the postantennal organ is shown with the location of the sen.sorv 

 cells connected with it. Only a little of the lahral nerve is shown. X 

 about 100. 



Figure i. Side view of the entire central nervous system of Aphoriira, compiled 

 from longitudinal sections. The smaller ganglia and the chief nerves 

 of the two large head centers are shown in the drawing. XIOO. 



Figure 3. Median longitudinal section of the last thoracic and abdominal ganglia. 

 The ventral side is up, the head end is at the left. X4S0. 



Figure i. Cross section of the head ganglia. The dorsal side is up. The esophagus 

 is between the two ganglia and a branch from the frontal ganglion is on 

 the dorsal side of the esophagus. The section is taken just back of the 

 connectives. X4-50. 



