THE 



TRANSACTIONS 



OF THE 



ENTOMOLOGICAL SOCIETY 



OF 



LONDON 



FOE THE YEAR 1884. 



I. Additional notes on the qenus Colias. By H. J. Elwes, 

 F.L.'S., F.Z.S. 



[Read November 7th, 1883.] 



Though it is only three years since I read a memoir on 

 the genus Colias, which was published in our ' Trans- 

 actions ' for 1880 (pp. 133 — 146), a great deal has since 

 been added to our knowledge of the genus ; and, as it 

 appears to be one of extraordinary interest on account 

 of its bearing on the development of species, I shall 

 make no apology for adding some observations to my 

 first paper. 



At least three papers of importance have appeared 

 since 1880 on this genus. One by Keferstein, in the 

 'Journal of the Zoological-Botanical Society of Vienna,' 

 October, 1882 ; the second by Dr. Hagen, in ' Proceed- 

 ings of Boston Natural History Society,' December, 

 1882 ; and the third by Alpheraky, in ' Stettiner Ento- 

 mologische Zeitung,' 1883, p. 488. 



Keferstein's paper seems to me to be based on very in- 

 sufficient materials and knowledge of the genus. The 



TRANS. ENT. POC. LOND. 1884. PART I. (APRIL.) B 



