NORTH AMERICAN LASPEYRESIINAE AND OLETHREUTINAE 15 



Specimens in National Collection, American Museum, and collec- 

 tion Barnes from Colorado. 

 Alar expanse. — 20-24 mm. 

 Type. — In National Collection. 

 Type locality. — South Park, Colo. 



9. DICHRORAMPHA PIPERANA (Busck) 



(Fig. 281) 

 Hemimene piperana Busck, Proc. Biol. Soc. Washington, vol. 19, 1900 

 p. 177. — Barnes and McDunnough, Check List Lepid. Bor. Amer., 

 no. 7261, 1917. 



Superficially resembling both hanana and sedataTia. Differs from 

 the latter very distinctly in genitalia and from both in the venation 

 of fore wing (vein 10 is over twice as far from 9 at base as 9 is 

 from 8 in piperana., and much nearer 9 in the other two species). 



Male genitalia figured from type. 



In addition to the type, I have seen only one other specimen, a 

 male from Washington in the American Museum. 



Alar expanse. — 18 mm. 



Type. — In National Collection. 



Type locality. — Pullman. "Wash. 



10. DICHRORAMPHA SEDATANA (Bnsck) 



(Figs. 107, 283) 



Hemimene sedatana Busck, Proc. Biol. Soc. Washington, vol. 19, 1906, 

 p. 177. — Barnes and McDunnoxigh, Check List Lepid. Bor. Amer., 

 no. 7260, 1917. 



Hemimene plumhana Fernald (not Scopoli), in Dyar List N. Amer. Lepid., 

 no. 5291, 1903. 



Very close to the European plumhana and probably only a race 

 of that species. The two have been distinguished on pattern and 

 color; plumhana having a somewhat stronger irroration of yellow 

 scales on fore wing and sedatana a more abundant dusting of black 

 on the inner margin of the metallic lines. These characters are 

 somewhat variable. In genitalia I see no appreciable difference 

 between the two. For the present, however (at least until the Ameri- 

 can form is reared), they had best be kept separate. 



Genitalia figured from specimens in National Collection from 

 Mount Tzouhalem, British Columbia ("24-V-21, Blackmore No. 

 424," male), and Siskiyou Mountains, Calif. (" 7-VI-15-1872, Wal- 

 singham No. 91829," female). 



Distrihution. — Colorado, California, British Columbia, Alaska. 



Alar expanse. — 12-15 mm. 



Type. — In National Collection. 



Type locality. — South Park, Colo. 



