251 . 



uniform fawn-color; body and hind wings paler. An inner, straight, brown 

 line, edged externally with yellowish-brown; outer line slightly sinuate. 

 Discal dot large lanceolate-oval; two conspicuous dark spots midway between 

 the outer line and the edge of the wing, one being subapical in position. 

 Fringe on both wings a little darker than the wings themselves. No markings 

 on hind wings ; no discal dot. Beneath, a decided ochreous tinge, no lines, 

 discal dots distinct on both wings; fringe considerably darker than the rest 

 of the wing. The female differs from the male in the lines being farther 

 apart. 



Length of body, $ , 0.50, 9, 0.50; of fore wing, <?. 0.C0, 9, 0.G6 ; 

 expanse of wings, 1.40 inches. 



Sanzalito, Cal., August 7 (Behrens); California (Edwards); Yosemite, 

 October 19 (T. L. Mead). 



This species differs from marcescaria Gruen. in the much more pectinated 

 antenna? and the absence of lines on the under side of the wings, which, 

 beneath, are clear ochreous, not speckled with dark scales; while the two 

 spots with the discal spot arranged in a triangle give it a characteristic 

 appearance. 



Thamnonoma marcescaria Packard. Plate 9, fig. 69 



Haiia marcescaria Gueu., Paal., ii, 92, 1857. 



Halia cineraria Pack., Proc. Post. Soe. Nat. Hist.., xiii, 392, 1871. 



6 S and G 9. — This is an ash-colored species, with slender pectina- 

 tions; the fore wings distinctly falcate, and the hind wings more distinctly 

 angled than in any other species of the genus. Certain individuals I had 

 regarded as distinct, and described under the name cineraria; but the 

 addition of more material from Mr. Behrens shows that they are not different 

 from the true marcescaria. I append my original description to show how 

 certain individuals differ from others. 



Pale ash-gray. Male. Head and palpi ash ; wings a little paler, some- 

 times with a testaceous hue. The fore wings are marked just like T. mar- 

 cescaria, though the line is less distinct, but they are narrower and more 

 excavated just below the apex. The strigse are a little thicker on the eosta 

 than elsewhere. There are no indications of a basal line ; the outer line is 

 situated nearer the middle of the wing than in the other species ; in the 

 middle of the wing on the line is a black dot. Just beyond the line is a semi- 

 translucent broad band. Discal dot as in the other species. Beneath, the 



