WM. G. DIETZ, M.D. 25 



14. Conspicuously mottled with dark fuscous, two spots at end of 



cell 10. clialcofrontella. 



Not conspicuously mottled, five dots at base of apical third. 



17. maligeinmella. 



15. A fascia at one-third, more or less distinct 16. 



No fascia at one-third, 19. 



16. Fascia oblique 16. iceryasella. 



Fascia curved or angulated 17. 



17. Two furruginous spots in median space 12. busckiella. 



No such spots 18. 



18. Larger, costal part of fascia very conspicuous ...13. sciaphilella. 

 Smaller costal part of fascia not more conspicuous than dorsal 



11. confluentella. 



19. A large costal spot at two-fifths 14. plagiatella. 



Without such a spot 20. 



20. A streak above basal part of fold 15. livorella. 



Without such a streak 18. g'ilbociliella. 



2 1 . Forewings fuscous 22 . 



Forewings not fuscous 24. 



22. Basal space paler, angulated externally 21. stygna. 



Unicolorous 23. 



23. Discal spots present, hind wings grayish-fuscous 19. ftmebra. 



Discal spots obsolete, hind wings, semi-transparent, 



20. incoiispicua. 



24. Forewings ochreous-brown 25 . 



Ground color of forewings white 27. 



25. Expands 10 mm 24. nana. 



Expands 15 mm. or more 26. 



26. A patch of white scales in basal space 22. boreasella. 



Without such scales 23. micella. 



27. With marginal spots 28. 



Without such spots 45. 



28. Without a spot on posterior margin of cell 29. 



Posterior margin of cell with a spot in middle space 39. 



29. With conspicuous longitudinal streaks 25 elyella. 



Without such streaks 30 



30. A row of spots between first discal spot and end of cell. 



26. insulatella. 

 Without such a row of spots 31. 



31. One or two dark dashes in basal space 32. 



Without such dashes 35 . 



32. Two dashes in basal space 33. 



One dash in basal space 34. 



33. Fascia at one-third entire 28. sininlella. 



Fascia at one-third interrupted 29. messelinella. 



TRANS. AM. ENT. SOC, XXXVI. (4) FEBRUARY, 1910. 



