134 BULLETIN 132, UNITED STATES NATIONAL MUSEUM 



30. Basal patch of fore wing triparted (longitudinally divided into three 



patches) 31. 



Basal patch sometimes interrupted below costa, or blotted out upon costal 

 margin by pale shading, or vertically striated ; but never longitudinally 

 triparted 32. 



31. Dark pattern markings of fore wing brown ; alar expanse 20 ram. or over. 



(26) hippocastanum. 

 Dark pattern markings olivaceous ; alar expanse under 17 mm. 



(3) foedanum, 



(4) furfuranum. 



32. Alar expanse 14 mm. or less 33. 



Alar expanse 15 mm. or over 35. 



33. Dark areas of fore wing tawney ferruginous (40) nanamim. 



Dark areas of fore wing ocherous-fuscous 34. 



34. Thorax faintly and narrovi^ly lined with fuscous, anterior margin ocherous. 



(5) olivaceanum. 

 Thorax narrowly lined with ocherous, anterior margin fuscous. 



(46) troglodanum. 



35. Dark markings of fore wing olivaceous or ocherous-fuscous ; pale markings 



whitish-ocherous, more or less lined with fuscous, but with no purplish, 

 ferrugineous, or pinkish suffusion ; teeth of median band long and widely 



spaced apart (38) permundanum. 



Color pattern otlierwise ; if as above, then teeth of median band short and 

 narrowly spaced 36. 



36. General color of fore wing strongly ferruginous 37. 



General color of fore wing not markedly ferruginous 38. 



37. Underside of hind wing paler than underside of fore wing ; male genitalia 



with spined digitus projecting from neck of harpe near sacculus. 



(10) zellerianum. 

 Underside of fore and hind wings concolorous ; male genitalia with spined 

 digitus projecting from neck of harpe near cucullus. 



(33) sericoranum (part). 



38. Ante and post median pale areas of fare wing dark leaden purple ; cilia of 



hind wing fuscous (30) brunneopurpuratum. 



Ante and post median areas sometimes faintly purplish, but never dark 

 leaden purple ; cilia of hind wing whitish 39. 



39. Fore wing with central vertical dark line of antemedian pale area strongly 



marked and with well-defined lines of fuscous scales in postmedian pale 



area (9) rusticanum. 



All such lines rather weak and more or less discontinuous 40. 



40. Antemedian pale area of fore wing markedly whitish, in some specimens 



with a faint pinkish suffusion ; when the latter, then basal patch, median 



band and subapical bar rather strongly dusted with black 41. 



Antemedian pale area very pale sordid ocherous-fuscous or leaden metallic 

 with ocherous or pinkish suffusion ; when pinkish, no pronounced black 

 shading on dark pattern areas 42. 



41. Teeth of median band narrowly separated by a small triangular extension 



of the pale postmedian area ; male genitalia with spined digitus project- 

 ing from neck of harpe near sacculus (8) electrofuscum. 



Teeth of median band more broadly saparated by a roundish extension of 

 the pale postmedian area ; male genitalia with spined digitus projecting 

 from neck of harpe near cucullus (37) brevirostratum. 



