NEW AND OLD WORLD DANAIDAS 157 



emphasized in those of the New, being especially 

 evanescent in Tasitia where, however, traces of 

 the white markings remain distinct. It is sig- 

 nificant, however, that the black and white apex 

 is also lost in one of the forms of L. clirysippus, 

 viz. the variety dorippus ( = klugii), abundant in 

 many parts of Africa and also extending by way 

 of Aden and the west coast of India as far as 

 Ceylon. There is, in fact, much resemblance 

 between the pattern of dorippus and such a form 

 of Tasitia as lerenice, the likeness being especially 

 apparent in the indications of the former presence 

 of the white apical bar. In the forms of Tasitia, 

 as in some of Limnas, the ground-colour becomes 

 darker and richer a development especially well 

 seen in T. Berenice of Florida. Thus the two chief 

 points in which the pattern of Tasitia differs from 

 that of typical L. chrysippus, viz. the darker, 

 richer ground-colour and the evanescent apical 

 markings, are both presented by abundant Old 

 World forms of the latter species. The superficial 

 resemblances between these Old and New World 

 Danaines are precise and often extend to minute 

 details. Thus the scent-pouch on the hind wings 

 of the male, best seen from the under surface, is 

 similar in Salatura and Anosia, while the resem- 

 blance between Limnas and Tasitia in this respect 

 is even more striking. 



The resemblances above described suggested the 

 investigation and comparison of structural charac- 

 ters in order still further to test the relationship 



