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poides. On the "White Mle between El Duem and Gebel En 

 (lat. 14-1 2|° N.) four specimens were taken, thi-ee typical or 

 nearly so, one of the cdcippus form. These figures are in 

 marked contrast to the proportions found by the President * 

 among Mr. Loafs captures on the White Nile in lat. 11-4|° N. 

 In that case out of the same total (33), no less than twelve 

 were referred to '■'■ dorippus " (2), or ^' Jdugii" (10). Dr. Long- 

 staff called attention to the fact that whereas the transition 

 from the type to alcippus, or from dorippus, Klug, to albimcs, 

 Lanz., is quite gradual ; on the conti'ary, that from the type 

 to d&rippus appears to be abrupt. 



Two Mimics of Danaida chrysippus in Ceylon. — Mr. 

 T. Bainbrigge Fletcher exhibited two mimics of Z>. 

 chrysippus ; the ? ? of Elymnias undularis, and of Argynnis 

 hyperhius (niphe), whose c^c^ in both cases show the ordinary 

 coloration of the genera to which they belong. He said that 

 although in the ordinary preserved condition the resemblance 

 of these two ?? to Danaida was rather " rough and ready" and 

 by no means comparable to the close imitation of pattern seen 

 in the $ of Hypolimnas (also exhibited), yet under natural 

 conditions of flight the likeness between model and mimic was 

 exceedingly close and deceptive. Indeed, on the occasion of 

 his first acquaintance with Argynnis hyj^erhius $ on the wing 

 at Hongkong on April 22, 1897, he was completely deceived, 

 and took the butterfly for a Danaida until it settled on a 

 flower. The flight of the ? is slow and quite different from 

 the elegant sailing flight of its ^. 



The habits and flight of the two sexes of Elymnias undularis 

 are also quite different. The $ flies in the shade of thick 

 bushes and is wary and hard to catch, whilst the 5 flies slowly 

 along in the open. 



Although Danaida is probably well protected when on the 

 wing, he had noted at Galle on April 20, 1907, that these 

 butterflies, when settling down for the night about sunset, 

 exhibited a distinct preference for resting on small dead bushes 

 whose dry and withered leaves approximated closely in colour 

 to that of the undersurface of the butterfly. 



Cases of Mimicry from Ceylon. — Mr. Fletcher further 

 * Trans. Eut. Soc. Lond. 1903, p. 141. 



