LEP1D0PTERA HETEROCERA. 193 



Female. Deep black. Palpi porrect, not extending beyond 

 the head, in structure like those of B. splendida. Antennae slightly 

 pectinated. Abdomen not extending beyond the hind wings ; under 

 side and legs blackish cinereous. Fore wings with an oblique bright 

 orange patch in the disk beyond the middle. Hind wings bright 

 orange, with a broad deep black border, which is dilated opposite 

 the hind end of the exterior border. Length of the body 5 lines; 

 of the wings 14 lines. 



This may be connected with B. splendida by existing inter- 

 mediate forms. It differs from the latter by the much narrower 

 patch of the fore wings, and by the different outline of the orange 

 part of the hind wings. 



Mysol. In Mr. Saunders' collection. 



Genus BYKSIA. 



Mas. Corpus laeve, robustum. Proboscis gracilis. Palpi 

 brevissimi. Antennae graciles, setulosae. Abdomen alas posticas 

 superans ; fasciculus apicalis longus, subcompressus, apice sub- 

 ascendens. Pedes laeves, sat graciles ; tibiae posticae calcaribus 

 quatuor longissimis. Alae anticae amplae, apice subrotundatae, mar- 

 gine exteriore recto sat obliquo. 



Male. Body stout, smooth. Proboscis slender, moderately 

 long. Palpi very short. Antennae slender, setulose. Abdomen 

 extending somewhat beyond the hind wings; apical tuft elongate, 

 slightly compressed, inclined upward at its tip. Legs smooth, rather 

 slender ; spurs very long. Wings long, broad. Fore wings slightly 

 rounded at the tips ; exterior border straight, rather oblique. 



Byrsia dotata. 



Mas. Cyanea ; caput et abdomen nigra, hoc sub tus album ; tarsi 

 albi ; alee anticce plaga maxima aurato-ochracea, striga exte- 

 riore lata aurato-rufescenle ; posticce nigro-cuprece, striga 

 basali ochracea, spatio costali lato aurato-flavo. 



Male. Dark blue. Head, palpi, antennae and legs black. Abdo- 

 men black, white beneath. Tarsi and spurs of the tibiae white. 

 Fore wings with a very large conical gilded ochraceous patch, which 

 rests on the interior border and extends nearly to the costa, and is 

 more extensive on the under side; a broad gilded reddish transverse 

 streak between the patch and the exterior border, attenuated hind- 



