FORM ROGERSI 253 



as rogersi after its captor, by Trimen in 1908.^ The form 

 is dimorphic, the male having the wings blackish brown 

 and orange, but the orange is of a slightly more reddish 

 tint than in other forms, and approaches the hue of the 

 unique specimen previously mentioned from West Pondo- 

 land. There is an irregular area on the fore wing like 

 that in some of the varieties of terra in which the black 

 bar is broken through. 



The black and white female has a pattern after the 

 style of the typical female of the western eurytus, except 

 that the white area on the hind wing is very much larger, 

 and sharply outlined by a narrow black border. There 

 is a certain amount of reddish suffusion on the under 

 surface of the base of the hind wing. 



This form, rogersi, is represented in collections by a 

 single male and female at Oxford, the types. When I 

 was recently looking through Lord Rothschild's magni- 

 ficent collection of Pseudacraea eurytus at Tring, I found 

 there were three females bearing labels " Mombasa " 

 that appear to be of this form, but I do not know of any 

 other males. 



The only Planema of abundance in the locality from 

 which this form is known is Planema aganice, in its 

 eastern and northern form montana? In this form the 

 sexes are different and much more unlike than those 

 of the southern aganice ^ which, be it remembered, served 

 as model in Natal for the form of Pseudacraea eurytus 

 known as imitator. In aganice montana the male, instead 

 of having a creamy yellow pattern, has the same areas 

 of a rich orange. In the form rogersi now under dis- 

 cussion, the pattern is not quite like that of Planema 

 aganice montana, and is much nearer that of another 

 species of East African Planema, viz. adrasta. This 

 species has, in the male, a complete orange bar across 

 the fore wing, and the female has the very large sharply 

 marked white area on the hind wing. Specimens of 



1 Plate II, figa. 2, 4. « Plato II, iSga. 1, 3, » Plate II, figs. 9, 11. 



