ATHESIS. 109 



Genus V. ATHESIS. 



Head broad. 



Eyes large, prominent, nearly round. 



Maxillae elongate, rather stout. 



Labial Palpi small, rising but little above the forehead ; basal joint about five sevenths the 

 length of the second, subcybndric, curved ; second joint subcylindric, tapering towards the 

 apex, densely clothed behind, as is the first, with very long scales, in front with shorter 

 scales and a few short hairs ; third joint not more than one fifth the length of the second, 

 scaly, not hairy, ovate. 



Antennai elongate, nearly as long as the whole body, very gradually clavate ; the articulations 

 distinct, with two well defined channels below; the apical joints rather smaller than those 

 which precede them. 

 Thorax moderately stout. 



Anterior Wings diaphanous, with opaque markings, elongate ; the outer margin about one half, 

 the inner about two thirds, the length of the anterior margin ; anterior and outer margins 

 rounded, the inner slightly emarginate. Costal nervure extending to the middle of the 

 costa. First subcostal nervule thrown off before the end of the cell; second at about an 

 equal distance beyond it ; third nearer to the second than the second is to the first, about 

 equally distant from the fourth and from the end of the cell ; fourth nearer to the apex 

 than to the third. Upper disco-cellular nervule wanting, the first discoidal nervule just 

 touching the subcostal nervure, both being a little thickened at the point of meeting. 

 Middle disco-cellular nervule about two thirds the length of the lower, directed obliquely 

 inwards. Lower disco-cellular directed obliquely outwards, joining the third median nervule 

 at a point where it is bent at nearly a right angle. Internal nervure distinct, running 

 into the submedian. 



Posterior Wings diaphanous, transversely elongate, obovate ; anterior margin nearly straight 

 for about two thirds of its length, then curving very suddenly downwards in the males 

 less so in the females. Precostal nervure bifid. Costal nervure reaching the anterior 

 margin at a point beyond the sudden curvature of that margin in the males, not extending 

 so far in the females. Subcostal united to the costal nervure as far as the origin of the 

 precostal ; its first nervule terminating at the outer angle ; its second, soon after its origin, 

 bent at almost a right angle in the males, at a less angle in the females. Upper disco-cellular 

 nervule about one third the length of the lower, directed obliquely inwards. Discoidal 



