260 AMERICAN LEPIDOPTERA. 



obsolescence, a little outcurved as a whole and outcurved between the 

 veins. T. p. line geminate, rather abruptly bent outward below costa 

 and then very evenly oblique to the inner margin. The inner line 

 tends to be crenulated, only a little darker than ground, the outer 

 tends to become broader, even, and almost like a band with rather 

 diffuse edges. S. t. line concolorous, a little irregular, marked by the 

 blackish powdering in the terminal space, and a variably obvious pre- 

 ceding shade which forms a more definite mark on the costa. Median 

 shade forms the most obvious feature of the wing ; it is rather narrow, 

 well defined, but without sharp edges, crosses outwardly from costa 

 between ordinary spots to the lower edge of the reniform, and then 

 bends inwardly, parallel with and rather close to the t. p. line to the 

 inner margin. Claviform not traceable. Orbicular round or nearly 

 so, moderate in size, feebly defined by a slightly paler annulus, cen- 

 trally with dark powderings. Reniform kidney-shaped, of good size, 

 defined by a slightly paler ring, interiorly dusky. There is a series of 

 very small black terminal lunules. Secondaries pure white in the 

 male, uniformly smoky, with white fringes in the female. Beneath 

 white in the male, with a dusky lunule on primaries ; iridescent smoky, 

 without marks in the female. 



Expands, 1.30-1.60 inches = 33-40 mm. 



Hab. — Denver and Poncha Springs, Colorado ; July and 

 September. 



Two males and one female in good condition. Specimens 

 received from Mr. Bruce many years ago and placed with 

 caenis Grt., which the species in a general way resembles. It 

 is more powdery than that species however, and the course 

 of the lines is different ; its resemblance is really more nearly 

 to )nedialis, and I have no doubt that specimens of this form 

 are in collection as caenis and as medialis. It does not seem 

 to be common, judging by the small number that I have had. 



Euxoa lenola, n. sp. 



Ground color a rather dull leather brown, more or less clouded with 

 smoky. Palpi chocolate brown at sides. Collar dusky at extreme 

 base and, in well preserved specimens, a narrow gray line at tip. 

 Thoracic vestiture with tuftings gray tipped ; else concolorous. Pri- 

 maries at first blush seem uniformly dull brown, but on careful exam- 

 ination all the normal maculation can be traced. The lines are not 

 at all relieved, however, and scarcely darker than ground. The t. a. 

 is upright or nearly so, with slight outcurve in the interspaces. T. p. 

 nearly parallel with outer margin, slightly crenulate. S. t. a little 

 irregular. Claviform not traceable in any specimen. Orbicular round, 

 moderate in size, with a faintly paler annulus ; centre a trifle darker. 

 Reniform kidney-shaped, a little darker, more or less defined by yel- 



