338 THOMAS SAY FOUNDATION 



PLATE 24. 



Genitalia of Neoperla, Perlinella, Atoperla, and Perlesta. 



Neoperla elymene Newm. $ , dorsal view. 



Neoperla elymene Newm. $ , side view. 



Neoperla elymene Newm. 9 , ventral view. 



Neoperla elymene Newm. egg. 



Neoperla elymene Newm. egg. 



Perlinella drymo Newm. $ , dorsal view. 



Perlinella drymo Newm. $, lateral serrated chitinized plates of 



the penis. 

 Perlinella drymo Newm. 5, ventral view. 

 Perlinella drymo Newm. $, ventral view. 

 Atoperla ephyre Newm. $, ventral view. 

 Atoperla ephyre Newm. egg. 

 Atoperla ephyre Newm. egg. 

 Atoperla ephyre Newm. $, dorsal view. 

 Atoperla ephyre Newm. $ , ventral view. 

 Perlesta placida Hag. $ , ventral view. 

 Perlesta placida Hag. $ , side view. 

 Perlesta placida Hag. eggs. 



