AMERICAN LEPIDOPTERA. 15 



A smoky shading through the center of the primaries ; irregular interspaceal 



black lines and teeth; an oblique smoky subapical shading; ordinary 



spots visible in most specimens and sometimes defined. . . -longior. 



9. Maculation obscured, strigulate ; median lines lost or traceable only in the 



costal region 10. 



Maculation not strigulate; median lines at least traceable throughout or dis- 

 tinct 11. 



10. Ashy white, powdery: veins black streaked, markings obsolete or only feebly 



marked cinarginata. 



Bluish ash-gray; veins black streaked, s. t. line distinctly marked by sagit- 

 tate spots lioloc'iiierea. 



More even, less strigate, ashen gray ; t. a. line feebly traceable across the 

 wing geoi'jifii. 



11. Maculation clearly written on a whitish gray ground, not strigate; t. p. line 



and median shade complete; reniform without reddish shading, not 

 strigate ; basal black line distinct, the space above it not in any way 

 contrasting piiella. 



Maculation less clearly written ; t. p. line and median shade not obvious 

 below middle of wing; reniform with a faint reddish shading; basal 

 streak distinct, space above it paler, contrasting. . . .oregoiieii!>iis. 



Maculation obscurely written on a powdery, dull ashen ground ; basal black 

 line faintly marked, soinetimes hardly traceable 12. 



12. Smaller, darker, more powdery ; reniform broader, orbicular less contrasting. 



Winnipeg. 

 Larger, paler, less powdery; reniform narrow, orbicular somewhat contrasting. 



nninioda. 



13. A black bar connects the median lines in the submediau interspace ; macula- 



tion marbled 22. 



A black line extends from the tip of the claviform to the t. p. line ; reniform 



very large and broad 21. 



No connection between the median lines ; ordinary spots normal 14. 



14. Primaries more elongate, dull ashen gray; space between ordinary spots not 



darker ; reniform not marked with reddish 15. 



Primaries shorter, brighter in color, more contrasting ; space between ordin- 

 ary spots always darker, sometimes contrasting; reniform more or 

 less obviously shaded with reddish 16. 



Primaries uniform greenish gray 20. 



15. Powdered with black scales so as to give a rough, squamosa appearance ; or- 



bicular white powdered, oblique, contrasting; s. t. line made promi- 

 nent by distinct sagittate black spots laticinerea. 



Paler gray, not or not so much powdered, smoother; orbicular not contrast- 

 I ing ; s. t. line not prominently marked grotei. 



16. Median lines not well marked; t. p. line partly obsolete; reniform narrow, 



constricted centrally anteiinata. 



Median lines complete, well marked ; reniform large 17. 



17. Ground color ashen gray 18. 



Ground color greenish gray 19. 



18. Larger, longer winged; median shade not prominent; reniform with sides 



subparallel ; suborbicular present torrida. 



TRANS. AM. ENT. SOC, XXVII. AUGUST, 1900. 



