Explanation of Plates. 317 



Explanation of Plate XXI. 



Forms of Acrsea johnstoni, together witli their Danaine and 

 Acrseine models, i'rom the slopes of Kilimanjaro, 1905. 



The whole of the specimens figured, models as well as mimics, 

 were presented to the Hope Department by Eev. K. St. Aubyn 

 Rogers. 



All the figures are about i% of the natural size. 



Fig. 1. Amanris echeria, Boisd., (^ . The three largest spots of fore- 

 wing and submarginal spots of hind-wing are buff- 

 coloured : the submarginal and costal spots of fore-wing 

 much paler bufi", almost white. December 15-31, 1905 : 

 native collector. 



la. Acrxa johnstoni, form fallax, Rogenh. (= kilimandjara 

 Oberth.), ^ . Fallax diff'ers from the flavescens (Fig. 16) 

 and proteina (Plate XXII, 1«, 15) forms mainly in the 

 broader, rounder apex of the fore-wing, the rounded 

 instead of the squarish discal patch of hind-wing, and in 

 the sexual dimorphism, — the males oi fallax (Plate XXI, 

 la) having buff' spots in the fore-wing, the females (Fig. 2a) 

 white. Furthermore the rounded discal patch of the hind- 

 wing is here well seen to be indistinctly defined owing to 

 the invasion of dark internervular rays, while the 

 squarish patch of flavescens and proteina is sharply out- 

 lined. Intermediate forms occur, and there can be little 

 doubt that Aurivillius is right in suggesting that fallax 

 is a form of johnstoni. 



The male of fallax with bufi'-spots in the fore-wing is 

 seen to be an excellent mimic of the buft'-spotted forms 

 oi Amauris such as that represented in Fig. 1. 



The specimen shown in Fig. la was captured December 

 15-31, 1905, by a native collector. 



1&. Acrxa johnstoni, iovia flavescens, Oherth. The individual 

 represented possesses very pale buff' spots in the fore- 

 wing, much paler than those of the m&le fallax (Fig. la). 

 Specimens of flavescens however often possess spots of a 

 pronounced shade. The individual shown in Fig. 16 is 

 a mimic of Amauris echeria (Fig. 1), but as regards 

 the pale spots is transitional towards the mimics of 



