284 



PROCEEDINGS OF THE XATIOXAL MUSEUM. 



VOL. 40. 



abdominal segment 4. F'emora of Jast pair of legs extending to pos- 

 terior side of sco:ment 5. 



69 



75 



Figs. G5-70.— Argia emma, nymphal detail. 05. lyAiuuM, ventral view. 6.5a. Labium, dorsal 

 VIEW. C6-G7. Vulva. 68-69. Abdominal segment 9 of male. 70. Antenna. 



Figs. 71-76.— Aegia vivida, nymphal detail. 71. Laiuum, ventral view. 71a. Labium, dorsal 

 VIEW. 72-7.3. Vulva. 74-75. Abdominal segment 9 of male. 70. Antenna. 



Abdomen dark, with a white middorsal stripe, narrower anteriorly 

 and widening caiidad until mdcst on segments and 10, where it is 



