I 2 ) 



Millar, Mr. 0. X. Barker, Mr. Guy A. K. Marshall, Mr. G. F. 

 I .rid), and other entomological observe] - in Natal have brought 

 to notice several other cases of the pairing of these two forms, 

 and also various detail.- of habits, distribution, etc., which sup- 

 ported the view of their species-identity. Recently Mr. Millar, 

 having discovered the foodplant — a stinging-nettle recognised 



by Mr. •'. Medley W 1 as a species of Fleurya — has been 



enabled to test matters by breeding from ova laid respectively 

 by a waJdbergi, a mi •/, and two deceptor. These four 9 9 



were all taken toward- tie' end of March 1909 the waJdh 



[XV 



and the two deceptor on the 21st, and the mima between that 

 date and the 26th. 



The results were a- follows, viz. — 



i.m From 10 ova laid by one vooJdbergi were bred ! wahlbergi 

 5 £ , 1 ?, 1 deformed, sex undetermined), and 5 mima 

 • ■*. 1 ?)• 



(b) From .';',' ova laid by one mima were bred 33 mima 

 (24 6 cT,9 9 9)- 



From 139 ><\--i laid by two deceptor were bred 1"J7 



sptor (70 ' ',."•: 9 9). 



Experiment (a) proves the species-idi ■ and 



mint"; while experiment (6) seems to indicate the probable 

 predominance a- in the case of the . forms of Papilio 

 dard b-sp. cenea of the models .1 naurie echeria and 



albimaculata in affecting the mimetic pattern and colouring. 



Experiment (c) affords no evidence ol • belonging to 



the same Bpecies as the other two form-, all the hied examples 

 <.f both sexes being recorded by .Mi. .Millar as true to type. 



The case of Euralia wahlbergi and mima i- in agreement 

 withth.it of C liar axes zoolina and garde the 



dimorphism including both sexes; but there is a striking 

 difference t.. be observed, in that tin- double mimicry 

 highly developed in hoth 36X69 of the Euralia finds no place 

 in the Ci whose colouring in both forms, but especially 



in neanthes, i- by no men.- conspicuous and on the under-side 

 apparently ci \ plic. 



Mr. <;. F. Leigh's interesting account Proc Ent. So.-. Load, for 

 •Jl-t ■:..!„ i, 1908, ]>. l\iv, ami ''.Mi itober, L909, p. \lix <.f his expi 

 mental breeding of these forma from the 



