29 



Lake Mweru, and Ukerewe Island in the south of the Victoria 

 Nyanza/ On the west coast, trimeni appears to be represented 

 by another ancestral form, the relativeh' rare i//o;rvs/is, which will 

 be considered later. 



The next four drawers now placed in the frame represent 

 forms of the subspecies dardanus dardanus from Kisumu (Port 

 Florence), the inland terminus of the Uganda Railway on the 

 north-east shore of the Victoria Nyanza, from the northern and 

 north-western shores as far as the Anglo-German boundary. 

 The males of this subspecies, which extends to the west coast, 

 approach, in the relative amount of black marking, those 

 of polytrophus on the high Escarpment and the ^Madagascar 

 meriones. The females resemble Danaine and Acrœine models 

 of their locality, and here too, in the eastern part of the 

 range of the western subspecies, all the mimetic female 

 forms are represented. The commonest is hippocoon, and next 

 pianemoides, while trophonius and cenea are both relatively rare.' 

 The white sub-apical bar of i/ophonius is often transformed into 

 fulvous (the niobc form) in mimicry of Planona telliis, and in a 



1 Arkiv f. Zool., K. Sveiiska Vetenskapsakad., Stockholm, Bd. 3, No. 23, 

 1907. 



2 The corresponding female forms of the various subspecies of P. 

 dardanus were called by the same names in the address, notwithstanding 

 the fact that there are slight differences between them. Such differences 

 seem to be sufficiently indicated by preñxing the subspecific name. I 

 wrote upon this point in 1906 : " The name hippocoonoides has been given 

 by Haase to this form [hippocoon] in the eastern and southern subspecies 

 tibullus and cenea. This seems to me a most unnecessarily complex and 

 inconvenient procedure. The trophonius of the western subspecies 

 [named irophonissa (1907) by Aurivillius] merope [dardanus] is at least 

 as different from that of the southern cenea as are the two forms of hippo- 

 coon from the same areas. It is pretty certain indeed that each female 

 form of every subspecies has certain peculiarities and is not exactly like 

 the same form of any other subspecies. But this is quite sufffciently 

 indicated by prefixing to the female form name the subspecific name. 

 Papilio dardanus subspecies merope $ f. hippocoon of the west coast is 

 naturally different from P. dardanus subspecies cenea 9 f. hippocoon from 

 Natal, and it is quite unnecessary to express this by turning the last name 

 into hippocoonoides . To do so without making corresponding changes in 

 the other forms is inconsistent ; to be consistent in this respect is im- 

 mensely to increase and to increase uselessly an already tremendous 

 terminology," Trans. Eni. Soc, Land., 1906, p. 289. 



