METHONA. 115 



Genus VIII. METHONA. 



Thyridia Hubn. 



Head rather broad. 



Eyes oval, prominent. 



Maxillm rather slender, extending to about the middle of the thorax. 



Labial Palpi rising above the forehead, scaly; the scales in front of the first joint elongate. First 

 joint subcylindric, curved, about two thirds the length of the second ; second joint subcylindric, 

 slightly curved, obliquely truncate at the apex, which is slightly tapered ; third joint about one 

 seventh the length of the second, obovate, pointed. 



Antenna? elongate, about three fourths the length of the body, slender, terminating in a short 

 gradually thickened club, about one fifth the length of the antenna? ; the joints of which it is 

 composed more distinct than those preceding the club, the last pointed. 

 Thorax moderately stout. 



Anterior Wings diaphanous, with opaque markings, elongate ; the anterior margin slightly curved ; 

 the apex subtruncate ; the outer margin one half the length of the anterior, slightly emarginate 

 near the anal angle ; inner margin rather longer than the outer. Costal nervure extending 

 more than two thirds the length of the wing. First subcostal nervule thrown off about the 

 middle of the wing, anastomosing with the costal nervure opposite to the end of the cell ; the 

 second at some distance beyond the cell; the third much nearer to the fourth than to the 

 second. Upper disco-cellular nervule wanting. First discoidal nervule just touching the 

 subcostal nervure. Middle disco-cellular nervule directed obliquely inwards ; shorter than the 

 lower, which is directed obliquely outwards, and united to the third median nervule, where it 

 forms an obtuse angle. Submedian nervure much curved at its origin. Internal nervure short, 

 running into the submedian. 



Posterior Wings subovate ; the cell extending nearly to the middle of the wings. Precostal 

 nervule simple, directed outwards. Costal and subcostal nervures united for some distance 

 beyond the point where the precostal is thrown off, separating rather widely, and then 

 approximating ; the second nervule of the latter bent a short distance from its origin, where it 

 is joined by the upper disco-cellular. Upper and lower disco-cellular nervules both nearly 

 straight, directed very slightly outwards ; the lower one longer than the upper. Third median 

 nervule bent at an obtuse angle, where it is joined by the lower disco cellular. Discoidal 

 nervure not extending into the cell. 



October, 1847- I I 



