36 BULLETIN 123, UI^ITED STATES NATIONAL MUSEUM. 



42. Alar expanse over 16 mm (63) grindeliana. 



Alar expanse under 16 mm (64) stramineana. 



43. Ground color of fore wing olivaceous : 44 



Ground color not olivaceous 49 



44. Olivaceous tint more green than ochreous 45 



Olivaceous tint more ochreous than green 47 



45. Dark markings on fore wing an evenly distributed spotting of blackish 



fuscous (62) granulatana. 



Dark markings on fore wing more concentrated ; forming a faint fuscous 

 basal patch, a median longitudinal fuscous shading, a faint fuscous spot 

 on dorsum near tornus and a transverse band from mid costa to a 

 darkened subapical area 46 



46. Costa of fore wing distinctly marked from base to apex with short fuscous 



dashes; alar expanse under 15 mm (60) verniochreana. 



Costa appreciably marked with fuscous only on outer half; alar expanse 

 over 15 mm (59) olivaceana. 



47. Fore wing with an appreciable outer fascia or with a heavy clouding of 



purplish brown suffusing much of basal two-thirds ; head pale olivaceous 



ochreous ^_48 



Fore wing not so marked; head grayish ochreous (58) perangustana. 



48. Dark scaling of fore wing blackish fuscous ; cilia with a narrow blackish me- 



dian band (55) montanana. 



Dark scaling of fore wing purplish brown; cilia without blackish median 

 band (61) imbridana. 



49. Fore wing with a strongly ferruginous suffusion on terminal fifth; alar 



expanse over 25 mm (67) bucephaloides. 



Fore wing without such ; or if with, a contrasting ferruginous suffusion on 

 outer fifth, then alar expanse less than 25 mm 50 



50. Fore wing with a white or bluish white suffusion along entire dorsum ; or 



with a broad whitish patch on mid dorsal margin, paler than the ground 



color 51 



Fore wing without such ; mid dorsal pale area of the ground color 52 



51. Alar expanse 19 to 31 mm -. (66) offectalis (in part). 



Alar expanse not over 13 mm (48) kiscana. 



52. Head white or cream colored without any gray or fuscous dustings 53 



Head strongly dusted with grayish fuscous 54 



53. Fore wing with a pale brownish ochreous half basal patch, several fine cos- 



tal dashes and an irregular patch of the same color on outer dorsal mar- 

 gin before tornus ; ochreous markings largely suffusing the white ground 



color; alar expanse less than 20 mm (57) griseocapitana. 



Fore wing milk or cream white; dark markings obsolete or nearly so, not 

 as above, gray; alar expanse over 20 mm (66) offectalis (part). 



54. Cilia of fore wing ochreous with no blackish or fuscous dusting. 



(4) roseoterminana (male). 

 Cilia white or brown shaded with black, to the naked eye distinctly gray 55 



55. Fore wing with an appreciable median longitudinal brownish ochreous 



streak 56 



Fore wing without such (5) umbrastriana (male). 



56. Median streak not reaching end of cell (2) awemeana (male). 



Median streak reaching to or beyond end of cell 57 



57. Fore wing with veins beyond cell outlined with brownish ochreous ; ocelloid 



patch not defined (1) radiatana (male). 



Veins beyond cell not distinctly outlined with brownish ochreous ; ocellus de- 

 fined by two vertical silvery bars (3) essexana (male). 



