VJLK 



EXPLANATION OF FIGURES. 



16. 



17. 

 18. 

 19. 

 20. 

 21. 

 22. 

 23. 



Dorsal view left J abdominal 



appendages Lestes disjuacta. 



Same L. congener. 



Same L. rigilax. 



Same L. forcipata. 



Same L. uncata. 



Same L. rectangularis. 



Same L. inaequalis. 



Same -L. unguiculata. 



24. 



25. 

 25. 

 27. 



Lateral view external cj^ genital 

 organs of second abdominal seg- 

 ment of Diplax rubicundula, as 

 seen when the insect is turned 

 upside down. 

 Same D. semicincta. 

 Same D. ricina. 

 Same D. obtrusa. 



