Lcpidoptcra of the Altai Mountains. 347 



Kurai Pass July 25th. The specimens do not differ from 

 those of the Alps. 



130. E. fletcheri, sp. no v. (Plate XII, fig. 4 ? ). 

 When we crossed the pass between the Kurai and the 

 Bashkaus on July 24th, Mr. Fletcher took at about 7500 

 feet a single female EreUa, which I at once perceived to 

 be distinct from anything I had seen in the Altai. As, 

 however, I did not see it till the evening, I rode back the 

 next day a distance of four hours to see if I could find 

 more of it, but was unsuccessful. Though it comes 

 extremely close to and is perhaps identical with a worn 

 female taken by Leder somewhere in the Irkut Valley, 

 which was sent to me by M. Alpheraky as a female of 

 E dahanensis, yet it differs so much from two undoubted 

 females of that species taken in the Chamardaban 

 Mountains a little to the eastward, that after subinittmg 

 it to Dr. Staudinger for his opinion, I venture to describe 

 it as a new species. On plate XII, fig. 4, 1 have figui'ed this 

 specimen too-ether with a pair of dahanensis (fig. 5 ^ 6 ¥) 

 and a female (fig. 8) taken by Herz on the_ Vilui river, 

 and identified by him with dahanensis {cf. Ins, xi, p. 24b, 

 1899). This latter specimen, as well as a male from 

 the Vilui, for which I am also indebted to the Grand 

 Duke Nicholas Michailovitch, and another female (fig. 

 7) taken by Czekanowsky on a tributary of the 

 Ol'enek river in North-Eastern Siberia, for which I have 

 to thank the Museum of the Imperial Academy of Sciences 

 at St. Petersburg, differ from dahanensis m the bands and 

 ocelli below on both wings, as shown in the plate. They 

 are probably an Arctic variety of dahanensis, but our 

 knowledge of the fauna of these remote districts is not yet 

 sufficient to decide their specific position with certainty. 

 These three probably form a group, as far as we know 

 confined to Eastern Siberia, which has no near ally in 

 Europe. 



131 E. rossii, Curt.? var. cro, Brem. (Plate XII, 

 fig. 1, 3 ^ 2 $). 



On June 27th, when approaching a flock of Ovis ammon 

 I saw a large dark butterfly flying on the shaly slope of 

 one of the high mountains south of the Tchuja Steppe, 

 which I at once saw was an Erehia new to me, and as soon 

 as the rams were out of sight I got out my net and caught 



