22 AMERICAN LEPIDOPTERA. 



Eight specimens. Denver, Colo., Clear Creek, Colo., June 16th ; 

 all collected by E. J. Oslar. 



This species is very much like E. circula Hbn., but the size is very 

 much larger, and the costal and ocellic spots are somewhat differently 

 arranged. 



Eucosma saiidana sp. uov. 



Expanse 19-24 mm. 



Head : whitish clay-yellow: palpi white, dusted on outside with pale-clay yel- 

 low; antenna pale gray; thorax whitish in front, clay-yellow in middle and gray 

 behind; abdomen shining cinereous, tuft clay-yellow ; legs whitish, dusted with 

 ochreous. 



Forewing: ochreous-brown, inner half of costa, above cell, whitish, dotted with 

 browu ; ocellic spot large, covering almost the entire outer fourth of wing, finely 

 dotted with black in a large round spot, in the lower half are three horizontal 

 black lines, crossed by three vertical bars of shining golden scales. From the 

 outer half of costa are two long lines of shining scales, the inner runs obliquely 

 outward to end of cell, then vertically downward inside the ocellic spot, but sepa- 

 rated from latter by a line of ground color; the outer runs obliquely, outlining 

 the ocellic spot above to ternien below apex. A few metallic dots on interior of 

 wing. The outer half of costa is marked with small wedge-shaped whitish spots, 

 separated by the brown ground color. Cilia gray, jiowdered with black dots. 



Hind wing: pale gray, cilia whitish ; underside the same. 



Underside forewing: ochreous gray. 



Three specimens. Volga, S. Dak., W. E. Dietz ; Chimney Gulch, 

 Golden, Colo., Sept. 3, E. J. Oslar. 



Encosma reversana sp. nov. 



Expanse 17-19 mm. 



Head, thorax, palpi and abdomen white, shaded with pale brown on outer side 

 of patagia and palpi; antenna white, finely annulated between joints with fus- 

 cous; legs white, powdered with clay-yellow. 



Forewing : white, with grayish-brown spots and semi-fascise ; below the costa 

 these dark spots and bands all incline inward, that is, nearer the base on their 

 lower ends and nearer the apex at their upper ends. There is an obscure patch 

 of dark scales in middle of wing at base; from inner fourth of dorsal margin a 

 fascia runs obliquely outward above middle of wing, broader at its upper end ; a 

 band lies obliquely over end of cell, twice as long as wide and not touching either 

 costal or dorsal margin ; on outer fourth of dorsum a short oblique patch borders 

 inner side of ocellic spot; from apex is a short streak to middle of wing, broad- 

 ening out below. The costa is marked with alternate white and brown dashes, 

 the white dashes on outer half are geminate, and the pair before the apex curve 

 downward and outward into termeu below apex. Ocellic spot obscure, a few dots 

 of dark brown, bounded on each side by vertical bars of shining white scales. 

 Cilia white, dotted with black. 



Hind wing: yellowish-gray, cilia white; underside the same. 



Underside forewing: smoky gray, costal spots repeated. 



