16 Mr. H. J. Elwes' additional notes 



Colias Chrysotheme, Esp. 



Esp., Schmett., 1, 2, t. 65 (1777). 



Var. Keewaydin, W. H. Edw., Butt. N. Am., ii., Col., 

 pi. iv. 



Gen. 1, Ariadne, W. H. Edw., I. c. 



Gen, 2, Eurytlieme, Bdl., Ann. Soc. Ent. France, 

 p. 286 (1852); Zeller, Stett. Ent. Zeit., 1874, 

 p. 437; Boll, Berl. Ent. Zeit., 1880, p. 241 ; Hagen, 

 . Proc. Bost. Soc. Nat. Hist., 1882, pp. 15], 173. 



The account published by Mr. W. H. Edwards in the 

 2nd vol. of his work on the various seasonal forms and 

 geographical distribution of the species is so exhaustive 

 that I need only refer to it, and hope that it may serve 

 as a model to lepidopterists in other countries, and as a 

 warning to species-mongers to be more careful. I would, 

 however, observe that the distribution of this species is, 

 as far as I know, quite unparalleled by that of any other 

 species. We find the form Chrysotheme in a limited 

 district of Central and South-E astern Europe, but never, 

 as far as I know, with any marked variation. I have 

 seen a female which resembled in colour C. Ladakensis, 

 but nothing of the male sex which could be mistaken 

 for any other European species. 



In N. America, however, it occurs over a very wide 

 range : in northern and mountainous districts, where the 

 summer is short and there is but one annual brood, it 

 takes the form of Keewaydin, which so closely resembles 

 Chrysotheme that it is not easy to tell European from 

 American specimens. In California, Texas and other 

 warm districts where the summer is very long, the form 

 Keeivaydin is only found as a variety ; but there are 

 other very distinct -looking forms which belong to different 

 broods, Ariadne being the smallest, darkest, and earliest, 

 and Eurytheme the largest, brightest, and latest. 



Colias Philodice, Godt. 

 Godt., Enc. Meth., ix., p. 100, 1819; W.H.Edwards, 

 Butt. N. Am., ii., Col., pi. ii. iii. (1876) ; Hagen, Proc. 

 Bost. Soc. Nat. Hist., 1882, p. 174. 



C. Anthyale, Hiib., Zutr. Ex. Schmett., ii., p. 21, figs. 



307—8 (1823). 

 C. Eriphijle, AV. H. Edw., Trans. Ent. Soc. Phil., v., 



p. 202 (1876). 

 C. Chrysomelas,^. H. Edw., Proc. Cal. Acad. Nat. Sci., 

 Feb., 1877. 



