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XII. Note refiarding Delias sanaca, Moore, a ]]^estern 

 Himalayan Butterfly. By Lionel de Niceville, 

 F.L.S., C.M.Z.S., (fee. 



[Read April 8nl, 1889.J 



On page 161 of the ' Annals and Magazine of Natural 

 History,' fifth series, vol. xvii., 1886, it will be found 

 that I have given expression to the opinion that there 

 are three good species of the genus Delias allied to 

 belladonna, Fabricius, viz.: — "D. belladonna, West 

 China to Kulu; D. sanaca, Western Himalaya; D. 

 belucha, Beluchistan." I wrote the latter name from 

 memory; it should be D. flavalba, Marshall, from 

 Kunawar.* 



I have lately had reason to modify this view ; when 

 I wrote the above I had but a single specimen of 

 D. sanaca before me. Through the kindness of Mr. P. 

 W. Mackinnon I have received fourteen males and 

 five females of D. flavalba and D. sanaca from Masuri ; 

 and I have also before me six males of these two 

 species also from Masuri, and five males and one 

 female of D. flavalba (which constitute the type speci- 

 mens of that species) from Kunawar, contained in the 

 collection of Colonel A. M. Lang, E.E., captured by 

 himself many years ago. As regards these latter Epeci- 

 mens. Colonel Lang in discriminating them, and Major 

 Marshall in describing them as distinct species, were 

 quite justified ; though both the Masuri and Kunawar 

 groups of specimens are very variable in the amount of 

 black markings they exhibit on both surfaces, there is 

 no connecting link between them. My fresh specimens 

 from Masuri supply this link. When arranged in a 

 graduated series from the lightest-marked specimen to 

 the darkest, at no point can you draw the line dividing 

 them into two species. Kegarding these specimens, Mr. 

 Mackinnon (who is an old collector, and has known the 



- Proc. Zool. Soc. LoncL, 1882, page 759. 

 TRANS. ENT. soc. LOND. 1889. — PART II. (jUNE.) 



