POLYOMMATUS MARSYAS. 191 



wings have two linear narrow tails towards the anal 

 angle. P. Marsyas is a native of Brazil, Guiana, 

 and some other countries of South America. It is 

 greenish-blue on the upper side, changing with the 

 direction of the incident light into violet, the costa 

 and apical angle of the upper wings widely black. 

 Beneath the colour is lilac, glossy, with seven or 

 eight small black spots, surrounded by a white circle, 

 scattered over the disk of each wing ; the anal angle 

 bluish-green, with two short white transverse streaks 

 and two pretty large black spots ; tails black with 

 the extremity white, the outer one about half the 

 length of the other. Body blue above and whitish 

 beneath. The antennae, as in most of the Polyom- 

 mati, are black with pale rings. 



