1TLN-A. 113 



Genus VII. ITUNA. 



Heliconia Latr., God 1 . 

 Mechanitis Fab. 

 Tiiyridia Hiibn. 



Head broad. 



Eyes nearly round, very prominent. 



Manila; short, not extending much beyond the middle of the thorax. 



Labial Palpi rising considerably above the forehead. First and second joints densely clothed 

 with short scales, and in front with long hair-like scales and hairs ; the first curved, 

 subcylindric ; the second more than twice the length of the first, subcylindric, rather smaller 

 towards the apex; third joint much more slender, about one third the length of the first, 

 subcylindric, with the apex pointed, scaly, and furnished with a few long hairs at the base. 



Antenna; scarcely more than half as long as the body ; the club subcylindric, tapering, rounded at 

 the apex, not more than one fourth the whole length of the antennas ; the joints more distinct 

 and shorter than the preceding ones, slightly channeled below. 

 Thorax stout, rather elongate. 



Anterior Wings diaphanous, witli opaque markings; elongate ; the anterior margin nearly straighf ; 

 the apex rounded, somewhat truncate ; outer margin a little more than half the length of the 

 anterior, rounded, slightly emarginate near the anal angle ; inner margin nearly straight in 

 both sexes. Costal nervure extending beyond the middle of the cost a. Subcostal nervules 

 thrown off at about equal distances ; the first a little before the middle of the wing ; the second 

 just before the end of the cell; the fourth rather nearer to the third than to the apex. Upper 

 disco-cellular nervule wanting ; the first discoidal nervule just touching the subcostal nervure. 

 Middle disco-cellular much curved, shorter than the lower, the latter running obliquely outwards 

 to the third median nervule, which forms a considerable angle at, the point of junction. 

 Internal nervule very slender and short, running into the submedian. 



Posterior Wings with the anterior and inner margins produced at the base, both nearly straight, 

 the latter rather more than half the length of the former ; outer margin curved, sinuate-dentate, 

 more than three fourths the length of the anterior. Frecostal nervure stout, bifid. Costal 

 nervure reaching the costa about its middle. Second subcostal nervule slightly bent at the 

 point where it is joined by the upper disco-cellular. Cell about two fifths the length of the 

 wing. Upper shorter than the lower disco-cellular nervule, both slightly curved inwards, 

 directed immediately across the wing: the lower united to tin- submedian nervure, before the 



