TITHOREA. 99 



Genus I TITHOREA. 



Heliconia Latr., God 1 . §c. 

 Mechanitis Fabr. 

 Melinjea Hubn. 



Head broad. 



Eyes prominent, round, in some species covered with hairs. 



Maxillae of moderate length, rather fully developed. 



Labial Palpi clothed with scales, and externally with long hairs ; the tuft of hairs near the apex 

 of the second joint rather small. First joint curved, subcylindric ; second joint at least one 

 half longer than the first, subcylindric, very slightly curved, truncate at the apex, almost 

 mucronate ; third joint short, not one half so long as the first, cylindric, tapering to the apex. 



Antennas very elongate, the lower side with three distinct grooves extending nearly their whole 

 length ; the club slender ; articulations very distinct. 

 Thorax moderately stout. 



Anterior Wings rather broad, subtriangular. First subcostal nervule thrown off before the end 

 of the cell, being distant from it about one fourth of the length of the cell ; the second thrown off 

 at, or a little before, the end of the cell ; the third about equally distant from the second and 

 fourth ; the fourth rather nearer to the third than to the apex. Upper disco-cellular nervule 

 wanting, middle disco-cellular nervule directed obliquely inwards, about two thirds as long as 

 the lower, which is slightly curved and directed obliquely outwards, reaching the third median 

 nervule at a point where it makes a considerable angle. Internal nervure running into the 

 submedian. 



Posterior Wings obovate. Costal and subcostal nervures united for a short distance from their 

 origin, then widely separated ; the precostal nervure thrown off at the point where they divide. 

 Discoidal nervure united by a short upper disco-cellular nervule to the subcostal nervure at 

 the point where it divides, or to the second subcostal nervule immediately after its origin. 

 Lower disco-cellular about three times the length of the upper, directed obliquely outwards, 

 uniting with the third median nervule at some distance from its origin. 



Anterior Legs of the male clothed with scales and long hairs ; the femur not quite so long as the 

 tibia ; tarsus about one fourth or one fifth the length of the tibia, subcylindric, tapering at each 

 extremity, indistinctly two-jointed, the second joint much shorter than the first. Anterior Legs 

 of the female clothed with scales ; the femur and tibia about equal in length, the latter smooth : 

 tarsus about two thirds the length of the tibia, clavate, five-jointed; the first joint equal in 

 length to the rest combined, widening to the apex ; second about one third the length of the 



August, 1847. E E 



