LEPIDOPTERA HETEROCERA. 1549 



stout, smooth. Abdomen not extending beyond the hind wings ; 

 apical tuft very small. Legs smooth, rather stout; hind tibiae with 

 four short stout spurs. Wings ample, thinly clothed. Fore wings 

 slightly acute ; costa straight ; exterior border very slightly convex, 

 very oblique hindward ; interior angle much rounded. 



BUTOA ORCIPENNATA. 



Mas. Fuscescente-cinerea ; alee fusco conspersce, striga discali 

 fusca diffusa subtus nigricante ; anticce punctis costalibus ni- 

 gricantibus, fimbria fusco notata, plaga \costali subapicali 

 nigricante ; posticce fascia submarginali nigricante. 



Male. Brownish cinereous. Proboscis pale yellow. Palpi 

 blackish. Wings transversely speckled with brown ; discal streak 

 brown, diffuse, blackish beneath. Fore winirs with blackish points 

 along the costa ; fringe with brown marks ; under side with a 

 blackish patch near the tip of the costa ; this patch is the com- 

 mencement of a band, which is complete on the under side of the 

 hind wings. Hind wings much more darkly and distinctly speckled 

 beneath than above. Length of the body 8 lines ; of the wings 24 

 lines. 



a, b. Venezuela. From Mr. Dyson's collection. 



Genus BYLAZORA. 



Mas. Corpus sat gracile. Fasciculus frontalis porrectus. 

 Proboscis conspicua. Palpi porrecti, pilosi, obtusi, capitis latitu- 

 dine breviores, articulo 3o minimo. Antennas pectinatae, apice sim- 

 plices. Abdomen alas posticas non superans. Pedes laeves ; tibiae 

 posticae subincrassatae, calcaribus quatuor longis. Ala? lata? ; anticae 

 apice rotundatae, margine exteriore vix dentato ; posticae margine 

 exteriore subdentato. 



Male. Body rather slender. Frontal tuft prominent. Pro- 

 boscis distinct. Palpi porrect, pilose, obtuse, shorter than the 

 breadth of the head ; third joint conical, extremely minute. An- 

 tennae moderately pectinated, except towards the tips. Abdomen 

 not extending beyond the hind wings. Legs smooth ; hind tibiae 

 slightly incrassated, with four long spurs. Wings broad. Fore 

 wings somewhat rounded at the tips ; costa straight ; exterior bor- 

 der convex, slightly oblique, hardly dentate. Hind wings with the 

 exterior border slightly dentate. 



