LEPIDOPTERA HETEKOCERA. 187 



Genus 30. LIBISOSA. 



Mas. — Corpus robustum, laeve; palpi compressi, arcuati, fim- 

 briati, reversi ; articulus 3us vix arcuatus, 2o non brevior. Antennae 

 pubeseentes, selosae, ante medium incrassatae. Abdomen alas pos- 

 ticas non aut vix superans. Pedes validi, dense fasciculati. Alae 

 anticae apud costam recta3, apice subrectangulatae. Foem. — Palpi 

 lanceolati, arcuati, pubescentes, ascendentes. Antennae simplices. 



Male. — Body stout, smootb. Proboscis short. Palpi com- 

 pressed, curved, reverted, extending more or less over the thorax, 

 closely fringed to their tips ; first joint short ; second rising above 

 the vertex ; third hardly curved, as long- as the second. Antenna? 

 pubescent, thickened at about one-third of the length, with two setae 

 on each joint from thence to the tips. Abdomen not or hardly ex- 

 tending beyond the hind wings. Legs stout, densely tufied, espe- 

 cially the fore pair ; spurs lung. Wings moderately broad. Fore 

 wings straight along the costa, almost rectangular at the tips, 

 slightly or moderately oblique along the exterior border. Female. — 

 Palpi lanceolate, curved, pubescent, rising above the vertex. An- 

 tennas simple. Legs not. 



This genus is closely allied to Bocana by means of B. turpa~ 

 talis, but may be distinguished by the palpi of the male. 



1. LlBISOSA BUTESALIS. 



Mas. — Pallide fusca; palpi intus pallide lutei ; alee linea recta 

 alba submarginali postice angulata subtus undulata, lineis in* 

 teriore et exteriore fuscis denticulatis indutinctis, orbiculari 

 et reniformi parvis fuscis, Foera. — Minor; alee antica? 

 lineis interiore et exteriore sub obsoletis. 



Male. — Pale brown, brownish cinereous beneath. Palpi pale 

 luteous on the inner side. Thorax on each side with a pale luteous 

 line extending from it along the costa of the fore wings. Wings 

 with a straight white submarginalline, which forms an obtuse angle 

 near the interior an^le of the hind wings, and is indistinct and un- 

 dulating on the under side; interior and exterior lines brown, den- 

 ticulated, indistinct, obsolete on the hind wings above, but the latter 

 distinct beneath ; orbicular and reniform marks small, brown ; dis- 

 cal lunule very distinct on the under side of the hind wings. 

 Length of the body 6 lines; of the wings 16 lines. Female, — 



