LEPIDOPTERA HETEROCERA. 75 



abrupt curve by the costa ; submarginal line straight, much less 

 oblique than the exterior one, diffuse on the inner side ; reniform 

 mark brown, punctiform ; marginal line brown. Hind wings with 

 two indistinct denticulated brownish lines. Length of the body 6* 

 lines ; of the wings 1 1 lines. 



a. United States. Presented by E. Doubleday, Esq. 



Genus 15. GESONIA. 



Mas. Corpus vix robustum. Fasciculus frontalis subtrunca- 

 tus. Proboscis breviuscula. Palpi breves, porrecti ; articulus 2us 

 supra convexus, subtus pilosus ; 3us longi-conicus, 2i dimidio brevior. 

 Antennae serratae, ciliatae, corporis dimidio vix breviores. Thorax 

 squamosus. Abdomen sat planum, alas posticas non superans. 

 Pedes sat validi, vix pilosi ; tibiae posticse calcaribus longis. Ala? 

 mediocres, fimbria lata ; anticae margine exteriore obliquo sub- 

 recto. 



Male. Body hardly stout. Frontal tuft somewhat truncate at 

 the tip. Proboscis rather short. Palpi short, porrect, hardly longer 

 than the breadth of the head; second joint convex above, pilose 

 beneath ; third elongate-conical, less than half the length of the 

 second. Antennas serrated, ciliated, little more than half the length 

 of the body. Thorax squamous. Abdomen rather flat ; not extend- 

 ing beyond the hind wings. Legs rather stout, hardly pilose; hind 

 tibiae with long spurs. Wings moderately broad ; fringe broad. 

 Fore wings rectangular at the tips, almost straight and moderately 

 oblique along the exterior border. 



This genus is obviously allied to Hi/pena, notwithstanding the 

 short palpi and the obtuse frontal tuft, in which last character it 

 differs from all the other genera of the family. 



1. Gesonia obeditalis. 



Mas. Rufescente-fasca; palpi obscure fusci, supra cinerei ; alee 

 anticcB lineis interiore et exteriore nigricantibus denticulatis 

 indistinctis, lineis nonnullis dijfusis obliquis undulatis cine- 

 reis, punctis marginalibus et orbiculari punctiformi nigris, 

 reniformi e annulo oblong o punctum nigrum includente ; 

 posticce cinerece, lineis duabus obscure cinereis subtus con- 

 npicuis. 



H 2 



