45 i NOCTTTID-ZE. 



traces of a double curved an remedial line with double black points 

 on median nervure and vein 1 ; orbicular an oblique wedge-shaped 

 white mark slightly defined by black except above ; reniform a pale 

 bar defined by blackish scales, expanding into an obscure spot at 

 lower angle of cell and with black spot beyond it at upper angle ; 

 a rather diffused oblique black medial line from costa to median 

 nervure ; postmedial line double filled in with whitish, bent out- 

 wards below costa, excurved to vein 4, then hardly traceable witli 

 black point beyond it on vein 2, some white points with black 

 streaks between them beyond it on costa ; subterminal line very 

 indistinct, pale, with black points on inner side below vein 5 and 

 small black spot below 6 ; an oblique rather sinuous black streak 

 from terinen below apex with whitish above it: the terminal area 

 slightly more tinged with brown with pale streaks on the veins : a 

 terminal series of slight black lunules ; cilia yellow. Hind wing- 

 whitish tinged with brown, the terminal area suffused with brown ; 

 a dark discoidal luuule and terminal series of slight brown lunules ; 

 cilia white ; the underside white irrorated with a few black scales, 

 a black discoidal spot, minutely waved postmedial line incurved 

 below vein 2, and terminal series of small black lunules. 

 Hub. Venezuela, Aroa, 1 <$ . Exp. 26 millim. 



Genus BALSA. 



Type. 



Baha, Wlk. Can. Nat. & Geol. v. p. 250 (1860) malana. 



Garga.za, Wlk. xxxv. 1733(1855) tristrigella. 



Nolophana, Grote, Bull. Buff. Soc. Nat. Sci. i. p. 169 (1873) ... malana. 



Asisyra, Grote, Bull. Buff. Soc. Nat. Sci. i. p. 160 (1873) tristrigella. 



Proboscis fully developed ; palpi obliquely porrect, extending about the 

 length of head, the 2nd joint fringed above and below with hair towards 

 extremity, the 3rd moderate ; frons smooth with tuft of scale?, a ridge of scales 

 between antenna ; eyes large, round ; antennae of male typically bipectinate 

 with moderate branches to apex; thorax clothed almost eutirely with scales, 

 the pro- arid inetathorax with spreading crests ; tibia 1 moderately fringed with 

 hair; abdomen with dorsal crest, at base only ; build slender. Fore wing with 

 the apex rounded, the terinen evenly curved and not crenulate ; veins 3 and 5 

 from near angle of cell ; 6 from upper angle ; 9 from 10 anastomosing with 8 

 to form the areole ; 11 from cell. Hind wing with veins 3, 4 from angle of 

 cell; 5 obsolescent from just below middle of discocellulars ; 6, 7 from upper 

 angle ; 8 anastomosing with the cell near base only. 



Sect. I. (Balsa). Antennae of male bipectinate; fore wing with the areole 

 normal. 



4150. Balsa malana. 



Brachytania malana. Fitch, 1st & 2nd Eept. Ins. N. York, p. 244. pi. iii. 



f. 5 (1856); Smith, Cat. Noct. N. Am. p. 193; Staud. Cat. Lep. 



pal. p. 362. 

 Balsa obliquifera, Wlk. Can. Nat. & Geol. v. p. 251 (1860). 

 Kola leodura, Staud. Kom. Mem. iii. p. 178, pi. 10. f. 2 (1887). 



Head and thorax blue-grey slightly mixed with brown ; sides of 



