188 WILLIAM T. M. FORBES 



FF. Four white costal streaks. 



G. Basal half of fore wings pure white 5. clemensella. 



GG. A golden busai streak from base to near middle. 



H. basal streak margined with dark brown on its lower edge 



6. argentifimbriella. 



1111. Basal streak unmargined 7. lucidicostella. 



KK. Two white dorsal streaks before the tornus. 

 F. With a median pale basal streak. 



G. Basal streak extended across the fold to the dorsum....9. hageni. 

 GG. Basal streak not extended to the dorsum. 



H. First dorsal streak short and broad, produced to base 



8. albanotella. 



HH. First dorsal streak extending more than halfway across the 

 wing. 



I. A white costal streak from base to one-third 17. rileyella. 



II. No such streak. 



J. Basal streak dark margined toward costa. 



K. First dorsal streak very long, reaching apex of second 



costal 13. obscuricostella. 



KK. Apex of first dorsal streak opposite that of first costal. 



L. Head and thorax white 15. olivaeformis. 



LL. Head and thorax reddish suffron 18. kearfottella. 



JJ. Basal streak unmargined. 



K. Thorax and basal portion of fore wings shining white 



16. caryaealbella. 

 KK. Thorax and basal portion of fore wings not white 



14. ostryaefoliella. 

 FF. Without a median pale basal streak. 



G. Apex of first dorsal streak opposite the apex of second costal. 



H. First dorsal streak very large 1. fitchella. 



HH. First dorsal streak not larger than opposite costal streak 



32. robiniella 

 GG. Apex of first dorsal streak opposite the apex of first costal. 



H. Pale markings very indistinct 12. obsoleta. 



HH. Pale markings well defined. 



I. Apex of second dorsal streak opposite the space between 



the second and third costal streaks; margins of opposite 

 streaks never uniting 11 sexnotella. 



II. Apex of second dorsal streak opposite second costal; mar- 



gins of opposite streaks uniting 10. ceriferella. 



DD. With a complete median fascia. 



E. Three posterior costal streaks 37. martiella. 



EE. Two posterior costal streaks. 



F. Dorsal half of the wing below the fold dark brown. 



G. A silvery basal streak in the fold 30. morrisella. 



GG. No basal streak 31. uhlerella. 



FF. Dorsal half of the wings not darkened. 



G. Fascia near middle 35. gemmea. 



GG. Fascia at one-third; basal streak very short 36. diversella. 



CC. Without an apical dot. 



D. Oblique costal and dorsal streaks, rarely meeting; no straight fascia; 

 sometimes one acutely angulated fascia. 



E. Basal streak very short and indistinct 29. auronitens 



EE. Basal streak long. 



F. A median angulated fascia of equal width throughout; white 



marks dusted internally 33. celtisella. 



