Fig. 20. Vulvar lamina of Gomphus and Lanfhus species, i. Gomplms 



ak. n r 4 •?• ^''^^^"^^/"^- 7: G. extlis. 8. G. spicatus. g. G. bore- 

 alls. 10 G. furcifer. ii. G. mllostpes. 12. G. pallidus. 13. G describtus 

 14. G. fraternus. 15. G. externus. 16. G. ventricosus. 17 G scuddTri 

 18. G. crassus 19. G vastus. These structures will be found on the ventral 

 surface of abdominal segment 9 of the different species. 



