20 



the internal vein, feebly dentate in its course, a blackish blotch preceding the line 

 on internal margin. Orbicular small, round, pale ringed, center coucolorous. Ren- 

 iform moderate in size, normal in shape, pale ringed, with a dusky lunnle inwardly, 

 else coucolorous. Between these spots the median shade is marked by a black costal 

 spot, thence continued as a narrow sinuate, faint dusky lino to the hind margin. T. 

 p. line gemiuate, distinctly marked on costa, thence interrupted, punctiform, marked 

 by black or brown venular dots, outwardly curved over cell. S. t. line narrow, pale, 

 interrupted, irregularly dentate. From the internal margin beyoud the t. p. line an 

 oblique, blackish terminal shade extends to the apex, somewhat narrowing above 

 the middle. Through this dark shade the s. t. line is picked out by pale scales. A 

 row of black terminal lunules, preceded by pale defining scales. Fringes very long, 

 with a central darker line, beyond which they are cut with blackish. Secondaries 

 glistening white, somewhat smoky basally, and with a very broad, black outer 

 margin. Fringes white. Beneath wings whitish, with a broad, black terminal mar- 

 gin. Primaries with a whitish terminal line. Fringes white, on primaries narrowly 

 cut with brown, becoming black at tip. Head with a brown frontal line and a brown 

 interantennal tnft. Collar black tipped, and behind it the thorax is powdered with 

 black scales; abdomen very pale luteous. 



Expands 1.25 inches— 31""". 



Eahitat, Colorado. 



A single female in Mr. Tepper's collection. A very distinct species. 

 The collar is evidently produced medially, and there is a distinct basal 

 tuft. The dark terminal space is characteristic. 



O SIMPLEX, sp. nov. 



Head, thorax, and primaries powdery fuscous, the macnlation distinct. Basal line 

 distinctly traceable, geminate. T. a. line upright or slightly incurved, strongly den- 

 tate, geminate, the outer line black, the inner line fuscous brown, included space 

 somewhat paler. A narrow black line from base to t. a. line. T. p. line faintly gemi- 

 nate, inner hue only distinct, black, slightly lunate, exserted over reniform, and some- 

 what incurved below. Claviform very long, almost crossing median space, black 

 margined, with a pale inner line and a~concoloi"ous center. Orbicular longitudinally 

 oval, paler ringed, coucolorous. Reniform moderate in size, pale ringed, with narrow 

 black margi)i, the ceuter somewhat paler. A faintly marked shade between the or- 

 dinary spots, less marked below median vein. S. t. line pale, interrupted, irregularly 

 sinuate and dentate, preceded by a series of long sagittate interspaceal black dashes. 

 A row of black terminal lunules. S. t. space pale at t. p. line, rapidly darkening to 

 the s. t. line. The veins are paler through the darker parts of the wing, and black 

 marked beyond. Secondaries white, semi-transparent, with distinct black outer 

 border. Fringes white. Beneath whitish, with smoky-black outer border. Head 

 with an interantennal blackish line followed by a pale line. Collar with a black line 

 inferiorly, black tipped, and a whitish line below the black tip. Thorax also sprinkled 

 with black scales. 



Expands 1.46 inches— 36"in\ 



Habitat, Ashley Valley, Utah. 



A single, somewhat rubbed specimen, without fringes to primaries, in 

 Mr. Edwards' collection. 



This species is closely allied to levis, and intermediate between that 

 and aiigustus. From the former it differs at once by the longitudinally 

 ovate orbicular. The ground color is not ochreous, and there are numer- 

 ous minor differences. The chief and very strongly marked difference 

 between the two is in the structure of the male genitalia, differences 

 which need not be pointed out here at present. 



