NORTH AMERICAN LASPEYRESIINAE AND OLETHEEUTINAE 13 ^ 



20. Dark pattern markings of fore wing brussels brown ; pale areas dull leaden 



metallic (23) sciotanum. 



Dark pattern markings velvety black-brown ; paie areas with a decided 

 rosy tint (24) trepidulum. 



21. General color of fore wing (botli pale and dark areas) markedly yel- 



low 22. 



General color otherwise 2.3. 



22. Dark markings of fore wing ocherous-orange ; pale areas yellow, faintly 



suffused with pinkish ; male genitalia with spiued digitus projecting from 



neck of harpe near sacculus (2) nitidanum. 



Dark markings of fore wing cadmium yellow; pale areas paler yellow with- 

 out pinkish sufl: usion ; male genitalia, with spined digitus projecting fi-(jui 

 neck of harpe near cucullus : (31) ferrugineanum. 



23. Median band of fore wing with both teeth long (three or more than three 



times as long as wide) : invading extension of postmedian pale area 

 between the teeth, deep and wedge shaped, deeper than distance separ- 

 ating the teeth ; alar expanse always over 15 mm 24. 



Never will all above characters. Teeth of median band normally short or 

 only miderately long ; sometimes lower long and upper correspondingly 

 short ; where teeth are inclined to be long the space between them is 

 more round or oval than wedge shaped and equal to or greater than the 

 depth of the invading area separating them ; alar expanse either over 

 or under 15 mm. ; when both teeth are long expanse always less than 

 15 mm 26. 



24. Pattern markings of fore wing brussels brown to dark brownish fuscous. 



(25) nigranum (part). 

 Pattern markings of fore wing paler, more olivaceous (ocherous tawney 



or tawney-olive) 25. 



Pattern markings of fore wing pale rust red shading to olivaceous on mid- 



dorsum and toward base (32) fagigemmeanum (part). 



25. Thorax ocherous-tawney with little pale dusting except upon anterior 



half of tegula (22) tilianum 



(47) exaeresimum. 

 Thorax pale or whitish ocherous faintly cross barred with dark fuscous. 



(32) fagigemmeanum (part). 



26. Median band of fore wing much darker toward costa than toward 



dorsum 27. 



Median band uniformly colored or but very little darker toward costa — 30. 



27. Dark dusting of median band confined to a small quadrate blackish fuscous 



patch on costa (43) concinnanum. 



Dark dusting diffused over upper half of median band 28. 



28. Dark part of medium band dark brown ; pale areas of fore wing somewhat 



ferruginous or purplish ocherous 29. 



Dark part of median band blackish fuscous; pale areas of fore wing whitish 

 ocherous (12) atrodentanum. 



29. Lower tooth of median band same length as upper, well separated from 



subapical bar; male genitalia with spined digitus projecting from neck of 



harpe near sacculus (11) footianiim. 



Lower tooth of median band longer than upper, connecting with subapical 

 band ; male genitalia with spined digitus projecting from neck of harpe 

 near cucullus (34) melanomesum. 



