NATURAL SCIENCES OF PHILADELPHIA. 2t)l 



straight, but slightly emarginate above the interior angle ; the posterior ovate, 

 and both with rather short cilia. 



Species. 



\ Fore wings with two short dark brown streaks at the ba3e of the fold. 

 Popeanella. 

 \\ Pore wings with no basal streaks. 



Labial palpi in the rj 1 as long as thorax. 

 Plumifrontella . Rubescent, mixed with maroon brown. 



Labial palpi in the $ not recurved on thorax. 

 ArCanella. Dark brown, with a purplish hue; luteous brown in the fold. 



A. plumifrontella . Labial palpi reddish brown. Thorax dull brown 

 tinged with reddish. Fore wing rubescent and maroon brown intermixed, the 

 former hue prevailing along the fold, at the base along costa and disc, dusted 

 with dark brown ; with a dusky or dark brownish spot on the end of the disc. 

 one about the middle of the fold and another near the base. In some speci- 

 mens these spots are quite indistinct. Hind wings dusky brown. Exp. al. 17 

 lines. 



Female not known. 



All my specimens of the following species are much faded from exposure. 

 The specific description will not therefore apply accurately to the insect as it 

 is found in nature. 



Antennoz of the $ distinctly serrated beneath. 



A. Popeanella . Labial palpi dark brownish, whitish ? at the tip in the 

 9. Thorax dull brownish in the tf, with the tegulje tipped behind with gray; 

 whitish? tinged with brown in the 9- Fore wings brownish luteous or dull 

 reddish brown, with luteous or yellow aloug the fold and. inner margin, a spot 

 on the disc and one on the middle of the nervules of the same hue, with a dark 

 brown spot between them ; a dark brown spot on the fold beneath median 

 vein, most frequently semicircular, with a short, dark brown streak at the ba3e 

 on the submedian vein and another parallel to it beneath the median. The 

 anterior margin striated from the costa with dark brown, with a subterminal 

 row of dark brown spots above the branches of the median vein, and the ends of 

 the nervules dotted with the same hue ; cilia pale yellowish brown. Hind 

 wings brownish yellow, cilia the same. Exp. al. 12 to 18 lines. 



Male and female alike. 



From Smithsonian Institution. Capt. Pope's collection in Texas. 



Labial palpi shirter in tin $ than in the preceding ; ascending, but not recurved. 



A. arcane! la. Palpi luteous brown in front, dark brown externally- 

 Thorax dark brown, almost blackish. Fore wings dark brown, with an obscure 

 purplish hue; with luteous brown on the disc and in the fold, interrupted by a 

 blackish brown, nearly square, submedian spot in the fold and a small one near 

 its base of the same hue sometimes merely a few blackish brown scales with 

 an irregular blickish brown spot on the end of the uisc, and the costa and 

 apical portion of the wing dusted and dotted, sometimes striated with blackish 

 brown. Hind wings dark brown, tinged with blackish. Exp. al. 12 lines. 

 Female not known. 



The genera here deicribed may be distinguished from each other by the fol- 

 lowing table : 



Head rough. 



f Palpi cylindric. second joint with bristles above. 



1859.] 



