490 Mr. G. A. K. Marshall on 



Hence this characteristic widespread Ethiopian synapo- 

 seme and pscudaposome lias probably originated in a 

 diaposematic fusion of the triangular golden-brown patch 

 of the Zenobia Group of Papilios with the scattered 

 circular black spots which are characteristic of Ethiopian 

 Acrseas. I have made much use of Aurivillius' admirable 

 " Rhopalocera Ethio})ica " in this section which is devoted to 

 the discussion of an under-side syuaposume, although the 

 distinguislied author himself maintains that mimetic 

 resemblance is almost couHncd to the upper-side of butter- 

 flies' wings — a very strange conclusion {loc. cit., p. 535). 



G. Contpoand Grou-p containing Representatives of all the 

 three previously described. Species prohahly entering 

 tioo Groups. 



The groups described above fly together, and thus repre- 

 sent in a compound group the chief types of butterfly color- 

 ation which a young insect-eating animal of South and 

 Eastern Africa rc([uires to learn, by a trial of one or more 

 representatives. The following members of the three 

 groups were captured by Mr. D. Chaplin at Berea, a 

 suburb of Durban, on April 5, 189G, and are now in the 

 Hope Department. 



Black-and-White Group. Echeria-iAY^Y, Group. 



Amaitris oclilca. Amauris ccheria, var. alhi- 



Plancma aganicc $. maculata. 



Euralia mima. 



Chrysipp^is-iAKK Group. 



Limnas chrysippiis $. 



2 Hypolimnas misi2J2}us $, ^ type-form. 



2 Acriea petrma $ $. 



2 Aciwa cncedon, type-form and var. Lyeia. 



That the same species may produce two or more forms 

 entering as many groups is w^ell known, but, as a rule, 

 such polymor[)hism is confined to the female sex. In the 

 polymorphism of Amea cncedon, however (see pp. 4SB, 

 4-(S4), we have a case in which both sexes are present in 

 the various forms, and although the relative numbers of 

 the forms are very different and certain of them may 

 perhaps be absent from a district, I know of no case in 



