60 Journal New York Entomological Society. [Voi. xvii. 



appearance, none of the maculation complete, all the lines practically lost over the 

 costal region. A distinct short black streak at base in the submedian interspace, ex- 

 tending half way to t. a. line. T. a. line obvious only below median vein, whitish, 

 with edges more or less defined by black scales, strongly curved toward base, out- 

 wardly convex. T. p. line also whitish, with very narrow dusky defining lines, out- 

 wardly oblique to vein 5 where it forms a distinct angle and runs obliquely inward 

 evenly or with slight sinuations to the inner margin. The median lines are connected 

 in the submedian interspace by a narrow black line over which is a more diffuse 

 brown shading, which obscures the small, pointed claviform. S. t. line whitish, best 

 marked by dark shadings in the terminal space and more obscure preceding marks, ir- 

 regular in course, making two conspicuous outward dents which reach the outer margin 

 on veins 3 and 4 and extend through the fringes. A series of black terminal lunules. 

 Orbicular very long, narrow and oblique, only partially outlined, best marked anteri- 

 orly, most of the outline consisting of a narrow edging of white scales. Reniform 

 rather small, obscure, kidney-shaped. Secondaries very pale smoky yellowish at 

 base, with a broad, rather well defined smoky outer border, a terminal black line and 

 whitish fringes. Beneath whitish gray, with black powdering over a yellowish base ; 

 all wings with a black discal spot. 

 Expands, 1. 60 inches = 40 mm. 



Habitat. — Stockton, Utah, VI, 30. 



A single female in good condition, which I take pleasure in nam- 

 ing after Mr. Tom Spalding, its collector, from whom I have received 

 many interesting and rare species as well as much material in the 

 older forms. The new species is so altogether different from the other 

 described species that comparisons seem unnecessary ; and yet the 

 habitus is exactly the same, although it also recalls the yellow winged 

 Xylophasia liinafa and iiwrdinata. 



Oncocnemis semicollaris, new species. 



Ground color powdery ash-gray. Head inferiorly brown, with black edgings 

 above and below the band. Collar inferiorly, deep blackish brown. Thorax and 

 primaries a very even ash gray, with minute black powderings. All the markings of 

 primaries very fine, black and inconspicuous. Basal line just traceable. T. a. line 

 single, slender, a little excurved, with a small outward angle at the middle, from 

 which an equally slender black streak extends to the t. p. line. The latter is well 

 curved over the cell, then deeply drawn inward to the point where it meets the con- 

 necting line, then almost upright to the inner margin. There is no s. t. line and no 

 distinct terminal line. A distinct black streak extends from the end of the cell across 

 the t. p. line nearly to the outer margin, and small obscure blackish streaks are in the 

 interspaces just before the outer margin. Ordinary spots wanting. Secondaries 

 whitish at base, becoming dusky toward apex and to the middle of the outer margin ; 

 veins also dusky. Beneath whitish, powdery ; primaries darker, without markings 

 secondaries paler, with an obvious median line and a small discal spot. 



Expands, 1.22 inches = 31 mm. 



Habitat. — Peachland, British Columbia, July 8, 1907. 



