'^^i'sDi!^'] PROCEEDINGS OF THE NATIONAL MUSEUM. 203 



111 tabular form the species may be separated as follows: 



1. Large species, s. t. line paler, without W-mark, preceded by black spots 



or shades, more prouiiuent at middle aud again at hind angle 2 



Moderate in size, s. t. line preceded by a sei-ies of equal trigonate spots, 



wings narrow, apices distinct, rather prominent 6 



Small, or at most moderate.sized, species, the s. t. lines not preceded by 



dark shades; but the dark shade follows the line, or the terminal space 



is dusky 7 



Moderate in size, median lines connected by a prominent black line 12 



Moderate in size, a distinct W-mark ins. t. line 13 



2. Mediau liues distinct 3 



Median lines wanting, or merely traceable , 5 



3. Secondaries white, primaries whitish gray discalis. 



Secondaries dusky 4 



4. A distinct median shade ; sordid fuscous gray. 



S. t. line not defined rogenhoferi. 



No obvious median shade. 



S. t. line irregular, primaries bright gray nimbosa. 



S. t. line even, color sordid, dull gray imbrifkra* 



5. Primaries carneous or purplish gray; ordinary spots large, sometimes con- 



fluent PURPURISSATA. 



6. Color dirty, pale luteous, maculation not prominent insolens., 



7. Sordid luteous gray, powdery, maculation white marked, confused, wing form 



of insolens leucogramma. 



Primaries various in color, not luteous gray, more stumpy winged 8 



8. Secondaries white; primaries bright red-brown, reniform somewhat con- 



trasting, yellowish lepidula. 



Secondaries dusky 9 



9. Claviform small or wanting, concolorous 10 



Claviform prominent, black 11 



.0. Pale wood-brown, mediau liues distinct, single, black, even determinata. 



Deep vinous browu, with blue powderings, all the maculation faint, pow- 

 dery, not easily traceable. meditata. 



Carneous gray, powdery, maculation distinct, mediau and terminal spaces 



more brownish lustralis. 



A. Costa arched, wings therefore broader and more rounded than usual; mot- 

 tled fuscous brown, with yellowish shades detracta. 



Wings longer, narrower; dark ash gray; s. t. line prominent, preceded by 

 a distinct yellow-white spot at anal angle GNATA. 



12. Pale ash gray or whitish, narrow winged, with somewhat retreating anal 



angle distincta. 



13. Robust, sordid luteous to fuscous gray, the maculation sub-obsolete, ordinary 



spots usually confluent, claviform very large CROTCHii. 



Mamestra discalis Grt. 



1877. Grt., Bull. U.S. Geol.Surv., Ill, 797; Mamestra. 



Grayish white irrorate with black scales; maculation undefined; 

 jtransverse lines barely traceable; s. t. line irregular, concolorous, 

 marked by the slightly darker terminal space and a preceding inter- 

 rupted blackish shade; a row of terminal lunules; claviform small, 

 powdered with dark scales; ordinary spots large, concolorous, indis- 

 tinctly outlined by dark scales, cell between them black. The secon- 



