THEOREMA. 69 



Genus THEOREMA, Hem (son. 



Theorema seems to stand between Eummts and Thecla. In form the eye detects in 

 it, with its rounded inner margin, considerable likeness to Callithea Leprieurii. 



Head of moderate size; eyes very slightly hairy. Palpi long; the second joint squamose, 

 round, not embracing the head ; the terminal joint long, pointing outwards. Antenna slender 

 (much more so than in Eumaus) with few joints, the club long and slender. 



Anterior wing with the margins of nearly equal length, all rounded outwardly. Costal 

 nervure two-thirds the length of the wing ; subcostal nervure with two branches. 



Posterior wing round, with one short tail ; the discoidal cell half the length of the wing. 



Fore legs robust like those of Eumceus. 



Theorema Eumenia, Hewitson. Plate XXVII. <s figs. 1, 2. 



Upperside. Male. — Ultramarine blue, greenish towards the outer margin of the anterior 

 wing, more distinctly green on the margin of the posterior wing : the fringe white, broader on 

 the posterior wing. Anterior wing with the apex and outer margin dark brown. 



Underside black. Anterior wing with the inner half ultramarine blue, the outer margin 

 broadly irrorated with white. Posterior wing with, beyond the middle, three bands of green- 

 white spots and a submargiual white line : the margin black. 



Exp. 2-^ inch. 



In the Collection of W. C. Hewitson, from New Granada. 



This species, though resembling Eummus most in the colouring of the underside, is more 

 nearly related to Thecla than to it. 



Genus THECLA. 



Thecla, Auctorum. 

 PseudolycjEna, Wallengren. 



Mr. Westwood has expressed his difficulty in giving a definition to this genus. I 

 have made it somewhat easier by removing from it all those species having a thud 

 branch from the subcostal nervure, leaving it to those species only which, with few 

 exceptions, are either American or European and have only two branches from the 



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