

Lepidoptera of New York and Neighboring States 237 



Key to the species 



1. Thorax and extreme base of fore wing black, contrasting 1. atrodorsella. 



1. Base of fore wing not black. 



2. Ground of fore wing pure white. 



3. Ground heavily dusted with black, appearing ash gray 20. allenella. 



3. Ground not noticeably dusted with black 2. canella. 



2. Ground of fore wing not pure white. 



3. Discal dot d with white or whitish scales in center much paler than 



ground." 



4. Discal dot b wholly or part white, or replaced by a larger irregular white 



dot; a and c often white also. 



5. Ground grayish; extreme tip of palpi pale, tuft of palpi large and 



widening strongly to tip of second joint; wing generally smoothly 



scaled 7. nebulosa; 8. plummerella. 



5. Ground reddish, extreme tip of palpi black (except in D. lythrella) . 



6. No trace of a pale or dark postmedial fascia; white scaling of discal 



dots a and b often fused into a patch. 



7. Black dots a and b also fused into a crescentic mark; discal dot d 



a vertical bar; ground heavily shaded with blackish; third 



segment of palpus rough, pale-tipped 16. lythrella. 



7. Black dots a, b, and d, small, round; ground bright crimson, nearly 

 even; third segment of palpus smooth, black-tipped. 



6. walsingha-mella. 

 6. A faint angulate postmedial line; discal dots all minute. 



7. Fringe of hind wing reddish tipped (5.) ciliella. 



7. Fringe of hind wing not reddish. . . . 5. applanu. 



4. Discal dots a and b without white scales; usually showing as black points. 

 5. A contrasting curved black line on disc. 



6. Ground mouse-gray 14. hyperella. 



6. Ground pale gray, tinted with red in fresh specimens. . 13. curvilineella. 



5. No such mark; fore wing often with a vague squarish dark spot on disc. 



6. Ground reddish, discal dot d often with a single white scale or a 



little transverse streak 12. fulva. 



6. Ground clay-color to ochre, discal dot d with half a dozen white 

 scales in a rounded group. 

 7. A black patch in disc before discal dot d, usually obliterating c. 

 8. Patch larger; ground mottled on a bright ochre under-color. 



3. pulvipennella. 

 8. Patch smaller; ground light, even clay-color; hind wing, below, 



very pale 4. argillacea. 



7. No black patch in disc; with raised scaling. 



8. Palpi strongly tufted on outer half of second joint; hind 



wing, below, dusted with blackish 8. plummerella. 



8. Palpi nearly smooth 9. scabella. 



6. Ground dull fuscous gray, with contrasting ochreous base. 



11. nigrinotella. 

 3. Discal dot d without any white scales, or any scales noticeably paler than 

 the ground color. 

 4. With a continuous dark terminal line toward apex, and a curved black 



spot on disc 16. lythrella. 



4. A series of terminal dots. 



5. Fore wing straw-yellow 17. fiavicomella. 



17 In this genus there are typically four dots in the cell. The first two are obliquely placed and 

 represent the orbicular, the outer two longitudinal, representing the reniform. I have indicated thesa 

 from the base outward with the letters a, b, c, d. Some authors speak of b as the inner and d as the 

 outer discal dot. 



