LETHITES. 35 



nearly parallel to the first inferior nervule; just beyond the arcuate portion it 

 is connected by a rather long, straight, oblique nei-vule, directed considerably 

 outward as well as downward, to the origin of the upper median nervule. The 

 median nervule is slightly enlarged at the base, and diminishes gradually and 

 regularly in size to its first divarication, which is scarcely beyond the middle of 

 the cell; the origin of its middle branch is slightly nearer the origin of the basal 

 than of the terminal nervule; the latter strikes the middle of the outer border. 

 The submedian nervure is sti-aight and not swollen at the base. The cell is 

 three times as long as broad, and scarcely more than half as long as the wing. 

 The article from which the above is quoted, as originally written, closes thus : 

 "The ueuration of the fore wing does not seem to me to accord suflSciently 

 with that of any known genus of Oreades to admit of its being classed with 

 them. It undoubtedly has close afiinities with the characters of the genus Debis 

 (=Lethe Hiibn.) as laid down by Westwood and Hewitson, if we exclude there- 

 from, as we should, the Papilio Portlandia of Fabricius. It is not a little 

 interesting to notice that these authors have arranged this gi'oup in immediate 

 proximity to the genus Cyllo (=Melaniti8 Fabr.), in which Dr. Boisduval placed 

 the fossil species from Aix, named by him sepulta. Kor is it less interesting to 

 find that in both genera all the living representatives (even including those 

 discovered since the publication of the * Genera of Diurnal Lepidoptera') are 

 natives of the East Indies; so that the fossil butterflies of Provence have their 

 nearest living allies in the far East." 



Although differing from Keorina (PI. II, fig. 8) very strikingly in the 

 form of the wing and the swollen base of the costal nervure, this genus has 

 some striking points of agreement with that in the neuration of the fore wing. 

 The nervure closing the cell indeed is straight in Lethites and strongly curved 

 in Neorina, but, as there, two of the superior subcostal nervules arise before the 

 tip of the cell, and the other two are thrown off at about equal distances 

 between the apex of the cell and of the wing; the vein closing the cell meets 

 the median nervure in both cases as far beyond its second divarication as that 

 is beyond the first; the shape and proportionate length of the cell is nearly 



