338 Mr. H. J. Elwes' notes on 



E. discoidalis, Kirby, is a very peculiar species, which 

 extends from Pochrofka on the Upper Amur to the 

 banks of the Yenesei Kiver, in lat. 70° N., and also 

 occurs on the western shores of Hudson Bay, from 

 whence I have specimens. It will probably be found 

 in other parts of North-eastern Asia and North-western 

 America, but I have not had the opportunity of com- 

 paring Asiatic with American specimens. Though placed 

 by Staudinger, who perhaps had never seen it, after 

 disa, it seems to me most nearly allied to ocnus. 



Next we have a group of so-called species from the high 

 mountains of Turkestan, namely, ocnus, Ev., tartarica, 

 Ersch., siho, Alph., thianshanica {? Stand. MSS.). 



Of these I have ocnus, from the Alatau and Tarbagatai, 

 which I cannot agree with Von Gumppenberg in treating 

 as a var. of lappona, and what were sent as thian- 

 shanica, from Kuldja and Transili, by Staudinger, which 

 differ in their greater size and the absence of the 

 reddish brown on the fore wings, which is distinct in 

 ocnus. 



This thianshanica is exactly represented by Alj^her- 

 aky's plate of siho male, whilst his iigure of siho female, 

 which is much smaller and more distinctly banded below, 

 represents exactly what I received as tartarica from 

 Erschoff (but of which I can find no published descrip- 

 tion), and in both sexes as siho from Alpheraky himself. 



It seems from this rather scanty material that ocnus 

 is a good species distinct from lappona, and that siho, 

 tartarica, and thianshanica are another, which is 

 variable both in size and in the colour of the under side, 

 and that both of them should be placed, as Staudinger 

 has done, in close proximity to lappona. 



Near to ocnus, but well distinguished by the shape of 

 the wings, in the male especially, and probably belonging 

 to a different group, we have E. radians, Stgr., with var. 

 usgutensis, from Osch and the South-eastern Altai ; and 

 E. kahnuka, Alph., from the Kuldja district. Both of 

 these seem quite distinct, especially the latter, which 

 has the costa and margins of both wings of a silvery 

 grey colour, quite unique in the genus. 



E. tyndarus. — This species has the widest range of 

 any non-arctic species, and occurs abundantly in the Alps, 

 Pyrenees, Spain, Greece, Caucasus, Central Asia, and 

 in the mountains of Colorado. It has been divided by 



