20 



j Hind margin of fore wings more or less white, . . .17. 

 1 Hind margin of fore wings not marked with white, . . 19. 



.. ( Hind marginal streak entire, pascuellus. 



( Hind marginal streak interrupted, 18. 



( Fore wings bright brown, dissectus. 



18. s 



( Fore wings dark brown, ...... labradoriensis. 



( Apex strongly acuminate ; tooth of stripe long, . satrapellus. 

 \ Apex not strongly acuminate ; tooth not long, . . .20. 



f Hind wings pure white, 21. 



( Hind wings not pure white, . . . . . . . 24. 



( White stripe short and wide, with the tooth near the end, bidens. 

 \ White stripe with tooth small and near the middle, . . 22. 



[ Apex acuminate, hastiferellus* 



\ Apex not acuminate ; slightly emarginate, . . . .23. 



White stripe wide, very near the costa, . . . leachellus. 



White stripe narrower ; more remote from costa, . prcefectellus. 

 ( White stripe narrower than the costal border, . argillaceellus. 

 \ White stripe wider than the costal border, . . . . 25. 

 c White stripe more than two-thirds as long as the wing, . 26. 

 25. < White stripe not more than two-thirds as long as the wing, 



(- alboclavellus. 



Under side of cell marked with black, . . . occidentalism 



rui 



lui 



Under side of cell not marked witbi black, . , . .27. 

 ( Fore wings ochreous cinereous, . . . . cypridalis. 

 (. Fore wings brown, ....*... hamellus* 

 r Terminal line present above, with three or four dots below, 29. 

 j Terminal row of three or four dots below and none above, . 30. 

 I Terminal row of seven dots, . 31. 



^ Terminal line more or less indistinct, , . . .44. 



Outer margin falcate, gausapalis. 



2J. 



( Outer margin not falcate, hortuellus* 



( Fringes of fore wings cut with whitish, .... trisectus. 

 \ Fringes of fore wings not cut with whitish, . . laciniellus. 

 Veins in the middle of fore wing whitish, . . . .32. 



31 



~ in the middle of fore wing not whitish, 



f Veins of hind portion light, edged with black scales, coloradellus. 

 I Veins of hind portion light, but not edged with black scales, 

 32< ^ bollerellus. 



^ Veins of hind portion not light, .... albilineellus. 



( Fringes golden yellow, 34. 



( Fringes not golden yellow, .87. 



