268 NYMPHALIDiE. 



The shape of the wings is slightly variable in this genus ; that of 

 the fore wing depends upon the apex being only subacute as in 

 the type form and many others, or strongly produced, falcate, and 

 acutely angular as in E. anosia. Sometimes the apex of the fore 

 wing is truncate, as in E. lepidea and its close allies. In the hind 

 wing the tornus is sometimes acutely produced as in E. anosia, or 

 more or less rounded as in E. appiades. 



The widespread forms in this genus have one or more geo- 

 graphical races and are remarkable for the similarity between the 

 males of the typical form and of the race, while the difference 

 between the females of the same is very striking and almost suffi- 

 cient to allow of their separation as distinct forms. 



Key to the forms of Euthalia. 



A. Pore wing : vein 9 emitted from middle of 



vein 7. 



a. Sexes not similar: $ upperside blackish 



brown with a very broad grey band on 

 hind wing occupying fully terminal half 

 of wing ; 2 upperside dark brown with a 

 transverse inwardly-oblique darker discal 

 band, no terminal band on hind wing . . E. cocytus, p. 271. 



b. Sexes similar : tf 2 upperside blackish 



brown with a comparatively narrow band 



on hind wing occupying about terminal 



third of wing. 



a'. This band pale grey E. lepidea, p. 272. 



b' . This band bright blue Race andersoni, p. 273. 



B. Fore wing: vein 9 emitted from basal half of 



vein 7. 



a. Apical joint of palpi attenuate from base 



to apex. 



a . $ 2 • Interspace between discal and 



postdiscal transverse lines on upper 



and under sides of fore and hind wings 



pure white E. cibaritis, p. 273. 



b' . Interspace between discal and post- 

 discal transverse lines on upperside of 

 fore and hind wings, in $ concolorous 

 with ground-colour of wing ; in 2 

 more or less concolorous with ground- 

 colour on hind wing, paling to white 

 or brownish white anteriorly on fore 

 wing. 

 a 2 . Hind wing : J upperside with a blue 

 terminal band : 2 ground-colour 

 underside more or less washed with 

 greenish blue. 

 a 3 . tf . Hind wing upperside : terminal 

 blue band comparatively narrow, 

 not extending on inner side beyond 

 postdiscal dark fascia. 2 • Fore- 

 wing upperside : interspace be- 

 tween discal and postdiscal dark 



