520 Eev. K. St. Anbyn Rogers' Bionomic Notes 07t 



1907. Thus my experience in British East Africa con- 

 firms that of Mr, G. A. K. Marshall in Rhodesia* and of 

 Colonel J. W. Yerbury at Aden,f and supplies further 

 evidence in refutation of Erich Haase's J assumption that 

 the immunity of specially protected forms is absolute and 

 defends them from the attacks of parasitic foes as well as 

 vertebrate enemies. 



[Taveta, July 5, 1905. 



I), clirysippus, for several months past, as far as I have 

 seen, has been always of the Idugii form, and I have not 

 seen 6 specimens of the type form in 6 months.] 



[Rabai, May 1, 1906. 



Have you any reason to believe that the Idugii form is 

 spreading at the expense of the type form of D. chrysippus ? 

 It would certainly seem to be the case in this Protectorate. 

 The great rarity of the type form which I noticed before 

 is by no means confined to Taveta, but seems universal 

 on the Coast district, where the climatic conditions are 

 anything but those of a desert area. I doubt if I have 

 seen half-a-dozen of the type form in the last 2^ months, 

 whereas the Mugii form has been as common as usual.] 



2. Nymphaline Mimics. Hypolimnas misijjpics, Linn., 

 also abounds in British East Africa, but unlike the Danaine 

 model, the proportionate number of the two females (inaria, 

 Cr., and the type form) shows no marked preponderance 

 on either side. 



There are also two species of Eiiryphene — E. senegalensis, 

 Herr.-Sch., and E. chricmhilda, Stand., both occurring in 

 the Coast hills, the females of which seem at first sight to 

 come into the chrysijjpus-cenired association. Both species 

 frequent shady places and are generally common where 

 found. Both male and female of both species settle on the 

 ground and on plants with their wings spread out. They 

 differ somewhat in their preferences, E. senegalensis being 

 generally found in cultivated country — banana plantations 

 and such like — whilst E. chrkmliilda affects the real forest 

 country and is more local. In both species the female 

 greatly resembles L. chrysippus, but on the upper side 



* Trans. Ent. Soc. Lond., ,1902, p. 338. 

 t Journ. Bomb. Nat. Hist. Soc, 1892, p. 209. 

 \ Researclies on Mimicry, Part II, English Translation, Stuttgart, 

 1896. 



