Explanation of Plate XXVIII. 



Mimicry of a Dunaine model, Amauris albimac\data (and probably 

 echeria also) by tbe females, but not by the males, of three species of 

 Papilio, in British East Africa (Kikuyu country: 1906-7). The 

 figures were prepared from the best of these Kikuyu specimens 

 available, regardless of precise locality. Some of the time and space 

 relationships of the mimicking species are shown on pp. 509-511. 

 The figured specimens are in the Hope Department, Oxford 

 University Museum. 



All the figures are about f of the natural size. 

 Fig. 1. Amauris albiinaculata, ^ : Kijabe Forest, about 7000 ft., 



Kikuyu country : August 3, 1906. 

 Fig. 2. Papilio jacksoni, 9 : captured at the same place and time as 



its model shown in Fig. 1. 

 Fig. 3. Papilio jacksoni, ^ : Nairobi, about 5500 ft.: Feb. 4, 1907. 

 Fig. 4. Papilio echerioides, British East African form of, 5 : Wei- 

 thaga, about 6000ft., 15 miles W. of Fort Hall, Kikuyu 

 country : March 30, 1907. 

 Fig. 5. Papilio echerioides, British East African form of, $ : cap- 

 tured at the same place and time as the specimen shown 

 in Fig. 3. 

 Fig. 6. Papilio dardanus, probably of the sub-species tibxdlus, $ 

 form cenea : captured at the same place and time as the 

 specimens shown in Figs. 3 and 5. The figured example 

 is somewhat transitional towards the hippocoon female 

 form, and a less perfect mimic than is usual in cenea. 

 Fig. 7. Papilio dardanus, probably of the sub-species tibullus, (^ : 

 captured at the same place and time as the specimens 

 shown in Figs. 3, 5 and 6. The specimen figured is an 

 interesting variety, possessing a series of small pale sub- 

 marginal spots in the black margin of the fore-wing. 

 The males of dardanus usually possess the large sub-apical 

 spot only. 



