514 Rev, K. St. Aubjoi Rogers' Bionomic Notes on 



(Plate XXIX, fig. 4), however, in which the bar is much 

 wider and the white spots in the fore-wing much larger, 

 are distinct members of the combination, with a strong 

 secondary approach towards the 2^'^^oteina, Oberth., form 

 of Acrz&a jolinstoni. The E. males (Plate XXIX, fig. 1) 

 resemble these two W. females in both size of spots aod 

 breadth of the ochreous bar, so that they too are well- 

 marked members of the association. The single E. female 

 (from Weithaga) is developed still further in the same 

 direction (Plate XXIX, fig. 2), being as far in advance of 

 the E. females as these are beyond their own males. 



It is probable that Neptis woodwardi has been deve- 

 loped from a form resembling li. incongrua. As regards 

 the reduction of the spots in the fore-wing and the loss of 

 the fifth spot the W. males are more specialised than the 

 E. As regards the development of an ochreous patch out 

 of a narrow baud the E. males and especially the female 

 are the more specialised. In N. incongrua the numerous 

 white spots form an irregular bar across the fore-wing. By 

 the loss of certain spots the bar-like appearance disappears 

 in iV. woodtoardi, while just those elements are retained 

 which bring about the mimetic resemblance to AcriBa 

 johnstoni. In the same manner the narrow white bar 

 crossing the hind-wing of incongrua is withdrawn towards 

 the base, broadened, and transformed into ochreous in 

 woodwardi, — all of which changes are in the directions of 

 the Acra^ine secondary and Danaine primary models. The 

 hind-wing bar of woodwardi from both E. and W. of the 

 Rift Valley occasionally retains more or less of the white 

 ground of incongrua. In such examples the costal end of 

 the bar is generally tinged with ochreous. E. B. P. 



3. Acrmne Mimics. 



The resemblance of the proteina, fiavescens, and fallax 

 (= Idli'iiiandjara, Oberth.) forms of A. johnstoni to the 

 eclhcria-cdhimacvlata models was described and figured by 

 Professor Poulton in 1906,* together with the likeness of 

 the forms fidvcsccns, Oberth., and scmifidvescens, to very 

 different Danaine and Acraiine models. The mimicry of 

 Amauris echeria by the commonest forms of A. Johnstoni, 

 viz. proteina and Jiavescc7is, had been suggested by the 

 same naturalist as early as 1897.f His 1906 memoir 



* Trans. Ent. Soc. Lond., 190G, pp. 299-3] 1, Plates XXI, XXII. 

 I Report British Association, Toronto, 1897, pp. 688-691. 



I 



