﻿THE ENTOMOLOGICAL MAGAZINE, Vol. III. Pt. Ill & IV. 12 L 



Fig. la. Cross section of the same at the level a in the former figure. Zeiss Apochr. 

 2mm X Comp. Oc. 8. 

 lb. Cross section of thu same at the level b in the former figure. 



2. Semidiagramatic view of a ventral eye (same species 



2a. Cross section of the same at the level a in the former figure. Zeiss Apochr. 



SmmXCorap. Oc. 12. 

 2b. Cross section of the same at the level b in the former fiigure. 



3. Distral parts of ommatidia (Sympetrum frequense) ； a, median sagit- 

 tal section, b， peripheral sagittal section, c, section made through the margin 

 of a cornea. Zeiss Dx2. 



4. Nymphal functional eyes (S. viridiaenea ). Zeiss DX4. 



5. Nymphal developing eyes consisting the parts other than those shown in 

 the former figure. Zeiss Dx4. 



Fig. 6. Cross section of a rhabdome in the dersal eye (S. viridiaenea). Zeiss 

 Apochr. 3mm X Comp. Oc. 12. 



Fig. 

 Fig. 

 Fig. 



Fig. 

 Fig. 



Fig. 

 Fig. 



