LEPIDOPTERA HETEEOCERA. 213 



Genus 54. ISANA. 



Mas. Corpus sat gracile. Palpi compressi, reflexi, thoracis 

 marginem posticum attingentes ; articulus 2us valde arcuatus ; 3us 

 rectus, fasciculatus, 2o non brevior. Antennae breves, validae, sub- 

 serratae, setosae. Abdomen alas posticas vix superans ; fasciculus 

 apicalis compressus. Pedes validi, vix pilosi. Alae longiusculae, 

 sat angustae ; anticae acute rectangulatae, margine exteriore per- 

 obliquo vix convexo. 



Male. Body rathex slender. Proboscis short. Palpi com- 

 pressed, reflexed over the head to the hind part of the thorax ; first 

 joint short ; second pubescent, much curved, extending to the fore 

 part of the thorax ; third straight, tufted with long hairs, as long as 

 the second. Antennae short, stout, subserrate ; each joint with two 

 moderately long setae. Abdomen hardly extending beyond the hind 

 wings; apical tuft ^compressed. Legs stout, hardly pilose ; spurs 

 long. Wings rather long and narrow. Fore wings very straight 

 along the costa, acutely rectangular at the tips ; exterior border 

 very oblique, hardly convex. 



1. ISANA LARUSALIS. 



Mas. Albida ; abdomen fusco fasciatum ; alee anticce fusca y costa 

 albido-testacea, lineis, venis et orbiculari punctiformi albis, 

 lineis interiore et exteriore rectis obliquis latis parallelis, sub- 

 mar ginali valde angulata, reniformi angusta extus concava 

 albo marginata ; posticce pallide fuscce, basi albidce, linea 

 submarginali denticulata. 



Male. Whitish, more cinereous beneath. Palpi with testa- 

 ceous hairs towards the tips. Antennae dark brown. Thorax 

 flecked with brown in front. Abdomen with incomplete brown 

 bands. Fore wings brown, whitish testaceous and with some brown 

 marks along the costa ; lines and veins white; interior and exterior 

 lines straight, oblique, broad, parallel; submarginal line deeply 

 angular; marginal lunules blackish, bordered with white; fringe 

 with whitish testaceous marks ; orbicular mark white, punctiform ; 

 reniform narrow, concave exteriorly, with a white border. Hind 

 wings pale brown, whitish towards the ba^e ; interior line obsolete ; 

 submarginal line denticulated; under side with a large brown 



