304 THOMAS SAY FOUNDATION 



PLATE 7. 



Genitalia of Pteronarcys, Pteronarcella and Perlodes. 



Fig. 1. Pteronarcys dorsata Say $, side view. 



Fig. 2. Pteronarcys dorsata Say 9 , ventral view. 



Fig. 3. Pteronarcys nobilis Hag. $ , side view. 



Fig. 4. Pteronarcys nobilis Hag. 9 , ventral view. 



Fig. 5. Pteronarcys calif omica Newp. $ , side view. 



Fig. 6. Pteronarcys calif omica Newp. 9 , ventral view. 



Fig. 7. Pteronarcys princeps Bks. $ , side view. 



Fig. 8. Pteronarcys princeps Bks. 9, ventral view. 



Fig. 9. Pteronarcys biloba Newm. $ , side view. 



Fig. 10. Pteronarcys biloba Newm. 9, ventral view. 



Fig. 11. Pteronarcys proteus Newm. $, side view. 



Fig. 12. Pteronarcys proteus Newm. 9 , ventral view. 



Fig. 13. Pteronarcys comstocki Smith 9 , ventral view. 



Fig. 14. Pteronarcella badia Hag. $ , dorsal view. 



Fig. 15. Pteronarcella regularis Hag., $, dorsal view. 



Fig. 16. Pteronarcella badia Hag. 9, ventral view. 



Fig. 17. Pteronarcella badia 9, ventral view. 



Fig. 18. Perlodes lineata Smith 9> ventral view. 



Fig. 19. Perlodes slossonae Bks. 9j ventral view. 



Fig. 20. Perlodes yosemite sp. nov. 9 , ventral view. 



Fig. 21. Perlodes americana Klap. 9> ventral view. 



Fig. 22. Perlodes ignota Smith 9 , ventral view. 



Fig. 23. Perlodes aurea Smith 9 , ventral view. 



Fig. 24. Perlodes irregularis Bks. 9 , ventral view. 



All except figs. 20 and 24, after Lucy W. Smith. 



