OLYRAS. 107 



Genus IV. OLYRAS. 



Head not so broad as the thorax. 



Eyes moderately prominent, nearly round. 



Ma.rilkc long, rather slender. 



Labial Palpi rising distinctly above the forehead, scaly, and in front densely hairy. First joint 

 subcylindric, slightly curved ; second joint one third longer than the first, subcylindric, 

 smaller towards the apex, the tuft of hair near the apex not large ; third joint about one 

 fourth the length of the second, ovate, slightly pointed, clothed with scales. 



Antenna about three fourths the length of the abdomen, very gradually incrassated towards 

 the apex ; the last joint smaller, pointed. 

 Thorax rather stout. 



Anterior Wings opaque, with diaphanous markings, elongate, sub triangular ; the outer margin about 

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

 margins slightly rounded ; the inner in the male rather deeply emarginate towards the anal angle, 

 less deeply in the females. Costal nervure extending nearly to the middle of the anterior 

 margin. Subcostal nervules thrown otf at nearly equal distances ; the first before the end 

 of the cell ; the second a little beyond it ; the fourth about equally distant from the third 

 and from the apex. Upper disco-cellular nervule wanting. First discoidal nervule just 

 touching the subcostal nervure. Middle disco-cellular directed obliquely inwards ; the 

 lower obliquely outwards, about equal in length to the upper, joining the third median 

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

 directly into the submedian nervule. 



Posterior Wings opaque ; of the male nearly orbicular, the anterior margin straight as far as 

 the end of the costal nervure, where there is a slight notch ; of the female obovate, the 

 anterior margin almost straight for about two thirds of its length from the base. Precostal 

 nervure simple. Costal nervure extending about two thirds the length of the wing Subcostal 

 nervure separating from the costal a little before the origin of the precostal ; its first nervule 

 reaching the costa just before the outer angle ; second nervule bent at almost a right angle 

 immediately after its origin, attaining the outer margin just below the apex. Upper 

 disco-cellular directed obliquely inwards. Discoidal nervule continued for some distance into 

 the cell, beyond the point where it unites with the upper disco-cellular, bent at a considerable 

 angle, where it is joined by the short, straight, lower disco-cellular, which unites with the 

 third median nervule at a point where it is bent at an obtuse angle. 



September, 1847. G G 



