20 AMERICAN NEUROPTERA. 



EXPLANATION OF PLATES. 



PLATE I. 



Fig. 1. Embia californica, dorsal view of insect. 



2. Hydropsyche oslari, genitalia of male. 



3. Colpotanlius medialis, % side, f ventral view. 



4. Hydropsyche slossonse, genitalia of male from above. 



5. Polyeentropus dispar, tip of abdomen from above. 



6. Hydropsyche hageni, upper plate of male genitalia. 



7. " slossonse, genitalia of male. 



8. ■' cockerelli, genitalia of male. 



9. " " male genitalia from above. 



10. '■ hageni, head from in front. 



11. " scalaris, male genitalia from above. 



12. '* hageni, male genitalia and tip of penis. 



13. " scalaris, male genitalia. 



14. '• bifida, male genitalia and upper plate. 



PLATE XL 



Fig. 15. Notiomyia mexicana, wings and maxillary palpus. 



" 16. Perla valida, venter of female. 



" 17. Gcera fuscula, genitalia of male. 



" 18. Sphinctogaster hdescens, forewing and palpus. 



" 19. iVama>n?/«a pZwiowis, forewing and palpus. 



" 20. Notiopsyche latipennis, forewing. 



" 21. Atomyia modesta, forewing. 



" 22. Perla carolinensis, venter of female. 



" 23. " californica, venter of female. 



" 24. Plectrocnemia auriceps, male genitalia. 



" 25. Atomyia modesta, tip of abdomen from above. 



" 26. Arctopsyche irrorata, genitalia of male. 



'• 27. Notiopsyche latipennis, genitalia of male. 



