THE CANADIAN ENTOMOLOGIST. 247 



marginal areas, and as a narrow, oblique, ill-defined band from middle of 

 inner margin to base of wing. Costal half of base largely whitish, followed 

 along costal margin by a blackish shade, which extends beyond reniform, 

 and fades gradually towards apex and disk into purplish-gray. T. a. line 

 visible only as an indistinct blackish line, separating the white basal shade 

 from the darker portion following, perpendicular to costa for short distance, 

 thence outcurved to a point below cubital vein, touching orbicular at its 

 lower basal extremity. T. p. line, from well beyond reniform, defines 

 sharply the purplish-gray shade outwardly, and proceeds in a series of 

 decreasing curves to below cubitus, where it joins t. a. line. Ordinary 

 spots very distinct ; orbicular large, circular, black, filled with gray scales 

 and surrounded by gray band, which in turn is ringed with black; reniform 

 oval, similar to orbicular, but outer black line is not continuous, being 

 open towards apex between veins Mj and M3. Claviform a slight black 

 wedge-shaped mark, crossed by t. a. line. The basal half of inner margin 

 below anal vein is occupied by a purplish-black patch, which extends 

 upwards at base as far as median vein. The anal angle is occupied by a 

 patch of similar colour, bordered inwardly by a whitish semicircular line. 

 Both these patches are much rougher in scaling than the rest of wing. 

 Veins scaled with black, most prominent near apex of wing. - Vein M^ 

 bordered with black at outer extremity, at which point an indistinct smoky 

 shade proceeds inward across the yellowish ground colour. Fringes 

 yellow, checkered with black. 



Secondaries white, with a small black discal spot ; veins prominently 

 marked with blackish-brown. Fringes white, bordered by a blackish 

 basal line, which towards costa becomes broken into spots. At extremity 

 of vein Cug a smoky shading. 



Beneath, primaries whitish, with prominent black distal spot and 

 blackish shading along costa, markings of upper side showing slightly 

 through wing. Secondaries as above, discal spot more prominent. 



Expanse, 35 mm. 



Habitat. — Redington, Ariz. 



Type, I S , coll. Barnes. 



This species belongs to the new genus Prothrinax, created by Hamp- 

 son (Cat, of Lep, Phal., Vol. VIII, p. 225) for luteomedia Sm., with which 

 species it bears a great superficial resemblance. Apart from its much 

 greater size, it may, however, be readily distinguished from luteomedia by 

 its prominent reniform, the lack of the apical black shading, and by the 

 black veining of secondaries. 



