330 JOHN B. SMITH. 



Group TERMINALIS. 



A single species also constitutes this group. It is peculiar in the 

 maculation of })riinaries which have all the markings present, but 

 fine, while there is a broad terminal shade through which the pale 

 s. t. line is readily traceable. In appearance it is plump — allied to 

 atrifasciata in that respect. The collar is also somewhat produced 

 medially and the basal tuft is distinct ; the species has no close allies 

 in the genus and is isolated for that reason. 



Further particulars will be given with the description of the 

 species. 



O. terininalis Smith, Insect Life, 1888. i, 19. 



Head, tlioraxanci primaries dull fusco-luteous, primaries with a broad blackish 

 terminal shade. Basal line of primaries faintly indicated by a few black .scales. 

 T. a. line geminate, marked on costa by distinct black spots then becoming very 

 faint, ti'aceable principally by the paler inclosed space, and again becoming dis- 

 tinct below the internal vein ; feebly dentate in its course ; a blackisli blotch 

 preceding the line on internal margin. Orbicular small, round, pale ringed, 

 centre concolorous. Reniform moderate in size, normal in shape, pale ringed, 

 with a dusky lunule inwardly, else concolorous. Between these spots the me- 

 dian shade is marked by a black costal spot, thence continued as a narrow, 

 sitjuate, faint dusky line to the hind margin. T. p. line geminate, 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 beyond the t. p. line an oblique 

 blackisli terminal shade extends to the apex, somewhat nari'owing 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 margin. 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 inter autennal tuft. Collar black tipped, and 

 behind it the thorax is powdered with black scales. Abdomen very pale luteous. 

 Expands 1.25 inches; 31 mm. 



Hab. — Colorado. 



A single $ in Mr. Tepper's collection. A distinct species; the 

 collar is evidently produced medially, and there is an evident basal 

 tuft. The dark terminal space is characteristic. 



Since the above was written I have seen other specimens from the 

 same State which agree j)erfectly with the typical specitnen ; there 

 is not much opportunity for variation apparently. 



