Lepidoptera of New York and Neighboring States 207 



17. Head and scaling on basal joint of antenna grayish ochreous with little admix- 



ture of white ( 15 ) carpinella. 



Head and scaling on basal joint of antenna ochreous with considerable admix- 

 ture of white ( 16 ) umbratica. 



18. Dorsal cilia on fore wing dull grayish fuscous 19 



Dorsal cilia on fore wing ochreous fuscous 20 



19. Larval case smooth ( 17 ) carycefoliella. 



Larval case with a notch on upper edge near posterior end (18) ostryce. 



20. Alar expanse more than 10 mm ( 19) limosipennella. 



Alar expanse less than 10 mm 21 



21. Larval case rough; mouth deflected to 90 degrees; posterior end flattened to a 



slightly curved edge (20) corylifoliella. (21 ) alniella. 



Larval case smooth; mouth deflected to 45 degrees; posterior end flattened to a 

 straight edge t ( 22 ) lentella. 



22. Ground color of fore wing yellow 23 



Ground color of fore wing brownish 26 



23. Costa of fore wing dark ( 23 ) ochrella. 



Costa of fore wing pale 24 



24. Costal and dorsal margins of fore wing white 25 



Costal and dorsal margins of fore wing pale yellowish, fusing with ground color 



of wing (24 ) gaylussaciella. 



25. Ground color of fore wing pale cream-yellow (25) eretaticostella. 



Ground color of fore wing dark yellow (26) Jcearfottella. 



26. Ground color of fore wing drab brown (27) polemoniella. 



Ground color of fore wing grayish brown 27 



27. Fore wing with two v.hite longitudinal streaks (28) astericola. 



Fore wing with four white longitudinal streaks (29) infuscatella. 



28. Fore wing with no fuscous or dark ochreous dustings on white areas 29 



Fore wing with white areas more or less dusted with fuscous or dark ochre- 

 ous • 36 



29. Alar expanse 10 mm. or over 30 



Alar expanse less than 10 mm (30) quadrilineella. 



30. Fore wing with a distinct dark medial streak arid a dark spot at end of cell 



(31) borea. 

 Fore wing without such 31 



31. Longitudinal white and ochreous markings on fore wing sharply contrasted. .32 

 Longitudinal white and ochreous markings on fore wing not sharply con- 

 trasted 35 



32. White median shade along upper margin of cell sending only two branches to 



costa ( 32 ) biforis. 



White median shade along upper margin of cell sending at least three branches 

 to costa 33 



33. Only three ochreous lines on fore wing (33) coenosipennella. 



More than three ochreous lines on fore wing 34 



34. 'ihree ochreous lines above fold in fore wing distinctly separated by white 



lines ( 34 ) cratipennella. 



Three ochreous lines above fold tending to fuse (35) shaleriella. 



35. Antennae distinctly annulated for basal half ( 36 ) ccespititiella. 



Antennae not distinctly annulated for basal half (37) ericodes. 



36. Head and greater part of fore wing pure white; dark dustings limited to a 



few scattered scales toward apex 37 



Head and greater part of fore wing ochreous 39 



37. Outer margin of fore wing mostly white (38) veroniceella. 



Outer margin of fore wing ochreous 38 



38. Hind tarsi annulated with fuscous (39) duplicis. 



Hind tarsi not annulated with fuscous ( 40 ) granifera. 



