Explanation of Plates, 317 
EXPLANATION OF PLATE XXI. 
Forms of Acrxa johnstoni, together with their Danaine and 
Acrexine models, from the slopes of Kilimanjaro, 1905. 
The whole of the specimens figured, models as well as mimics, 
were presented to the Hope Department by Rev. K. St, Aubyn 
Rogers. 
All the figures are about 3° of the natural size. 
Fie. 1. Amawris 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 buff, almost white. December 15-31, 1905: 
native collector. 
la. Acrea johnstoni, form fallax, Rogenh. (= kilimandjara 
Oberth.), ¢. Fallax differs from the flavescens (Fig. 1b) 
and proteina (Plate XXII, la, 1b) 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 of fallax (Plate X XI, 
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 buff-spots in the fore-wing is 
seen to be an excellent mimic of the buff-spotted forms 
of Amauris such as that represented in Fig. 1. 
The specimen shown in Fig. la was captured December 
15-31, 1905, by a native collector. 
1b. Acrexa johnstoni, form flavescens, Oberth. The individual 
represented possesses very pale buff spots in the fore- 
wing, much paler than those of the male fallax (Fig. 1a). 
Specimens of flavescens however often possess spots of a 
pronounced shade. The individual shown in Fig. 1b is 
a mimic of Amauris echeria (Fig. 1), but as regards 
the pale spots is transitional towards the mimics of 
