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XVII. Mr. Alfred D. Millar’s E-xim'imental Breeding from 
the Ova of the Natalian forms of the Nymphaline 
Gemis Euralia. By Roland Trimen, M.A., F.R.S., 
etc. 
[Read June 1st, 1910.] 
Plates LXI—LXV. 
In a preliminary note communicated to the Society through 
the good offices of my friend Professor Poulton on March 
2, 1910 (see Proc. Ent. Soc., 1910, p. xiv), I had the 
pleasure of making known the highly interesting results 
of my friend Mr. Alfred D. Millar’s experiments in breed¬ 
ing from the ova of the three forms of Euralia known to 
inhabit the coast-belt of Natal, and hitherto recognised 
as distinct species, viz.— E. wnlilhergi, Wallengr., E. mima. 
Trim., and E. deceptor, Trim. I now propose to give the 
promised full account of these experiments, as illustrated 
by the specimens, photographs, and carefully recorded 
observations furnished by Mr. Millar. 
Euralia is nearly allied to Diadema (= Hypolimnas), 
and was founded by Westwood in 1850 on two West 
African species (dubia, Palisot, and anthedon, Doubl.) 
having the discoidal cell of the hindwings open. Other 
distinctions of Euralia are the narrower head, considerably 
longer and gradually clavate antennae, and the anal angle 
of the hindwings more prominent in the male. The larva, 
as Mr. Millar observes, differs from that of Diadema 
misippus in its considerably longer spines generally, and 
still longer pair of spines or horns springing from the top 
of the head. 
Euralia, in the advanced development of its mimicry of 
the Danaine genus Amauris, almost equals the eurytus- 
group of another Nymphaline genus, Eseudacraca, with its 
similar wealth of close imitation of the Acraeine genus 
Planema. I have recently commented on the latter mimi¬ 
cries in my appendix to the Rev. St. Aubyn Rogers’ 
“ Bionomic Notes on British East African Butterflies,”* 
pointing out the persistency, exactness, and completeness 
with which these Fseudacraeae reproduce the pattern and 
* Trans. Ent. Soc. Lond., 1909, pp. 551-2. 
TRANS. ENT. SOC, LOND. 1910.— PART IV. (DEC.) 
