490 Mr. G. A. K. Marshall on 



Hence this characteristic widespread Ethiopian synapo- 

 seme and pseudaposeme has probably originated in a 

 diaposematic fusion of the triangular golden-brown patch 

 of the Zenobia Group of Papilios with the scattered 

 circular black spots wliich are characteristic of Ethiopian 

 Acrasas. I have made much use of Aurivillius' admirable 

 " Rhopalocera Ethiopica " in this section which is devoted to 

 the discussion of an under-side synaposeme, although the 

 distinguished author himself maintains that mimetic 

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

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



G. Cu'inpoiind Groi'jJ containing Representatives of all the 

 three previously described. Species proliahhj entering 

 two 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 requires 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, 1896, and are now in the 

 Hope Department. 



Black-and- White Group. Uchcria-LiKE Group. 



Amauris oehlea. Amauris ccheria, var. albi- 



Planciua aganice ^. maculata. 



Eurcdia mi met. 



C%ri/sip2Ms-LiKE Group. 



Limnas ehrysippus $. 



2 Hypolimnas misippus $, ^ type-form. 



2 Acrwa pctnva $ $. 



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



That the same species may produce tw^o or more forms 

 entering as many groups is well known, but, as a rule, 

 such polymorphism is confined to the female sex. In the 

 polymorphism of AcrcVa cncedon, however (see pp. 483, 

 484), we have a case in which both sexes are present in 

 the various forms, and altliough 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 



