430 PEOCEEDINGS OF THE NATIONAL MUSEUM. vol.xxii. 



crenulate, evenly outcurved over the cell and just a little drawn in 

 below. Subterminal line of tlie ground color, irregular, almost angu- 

 late, marked by the darker terminal space and by a preceding dusky 

 shade, which, is always distinct on the costa, but broken or even 

 obsolete below that point. A series of small, brown terminal lunules. 

 Olaviform feebly indicated by darker scales, variable in size. Orbicu- 

 lar round, oval, or elongate, variably evident, outlined by black or 

 dusky scales, and in the female with a dusky central shading, Eeni- 

 form upright, moderate in size, kidney-shaped, incompletely and imper- 

 fectly outlined, the center dusky. There is also a diffuse, darker, lute- 

 ous median shade, which darkens a trifle the outer portion of the 

 median space and may be scarcely noticeable. In one specimen the 

 ordinary spots are normally separated, in another the orbicular almost 

 touches the reniform, in the third the spots join and seem almost con- 

 fluent. Secondaries white in both sexes, the veins a little yellowish, a 

 broken, smoky, terminal line and a vague dusky outer shading. 

 Beneath white, a little powdery, with a dusky discal spot and an incom- 

 plete, powdery outer line on all wings. The fringes, especially on 

 secondaries, are unusually long. 



Expanse, 37 to 40 mm. = 1.48 to 1.60 inches. 



Habitat. — Glenwood Springs, Colorado, August and October (Dr. 

 Barnes); Nevada (Mrs. Herring). 



Two males and one female, all different, yet I believe representing 

 one species only. The long fringes to the secondaries, the plump, 

 heavy body, and the rather lengthily serrated male antennsB suggest a 

 Porosagrotis, but the genitalia agree with the Carneades type. In the 

 male type the smoky powdering is quite evenly distributed, except in 

 the subterminal space, and all the maculation is obscure. The male 

 cotype is less powdery and all the markings are in consequence better 

 defined. The female type while less powdery is quite as obscurely 

 marked as the first-mentioned male. More material would be very 

 desirable to fix the range of variation in this species. 



Type.— Gat. No. 4785, U.S.N.M. 



21. CARNEADES VALLUS, new species. 



Ground color very pale gray, over a pale luteous base. Palpi yellow 

 in front, dusky at the sides. Beneath dusky. Yestiture, thin, hairy, 

 somewhat divergent. Top of head and base of collar whitish, the lat- 

 ter tipped with yellowish hairs. Thoracic vestiture forming no obvi- 

 ous tufts; but posteriorly the hair is tipped with yellowish. Primaries 

 quite densely black powdered, darkening the wing beyond the trans- 

 verse anterior line. All the lines single. Basal line blackish, distinct, 

 reaching the submedian vein, bent on the median. Transverse anterior 

 line smoky, a little outcurved, with three interspaceal outcurves, of 

 which that in the submedian interspace is the longest. Transverse 

 posterior line obscure, crenulated, unusually close to the outer margin, 



