.S20 Mr. II. J. EIwos on the 



by Leder. A large number from the Tcliuja Mountains 

 vary considerably in size and colour above, but are ail 

 darker below on the hind-wing. They were common from 

 6000 — 8000 feet, flying fast over the alpine meadows, 

 and easily distinguished by their much more rapid flight 

 from mongola, which appeared to confine itself more to 

 the flat beds of the mountain streams. On comparing 

 these alpine specimens with those in Dr. Staudinger's 

 collection from the Kentei Mountains, they seem haidly 

 distinct enough from the valley form to be named as 

 a variety. 



24. C. hyah, L. 



This was very common in the Katuna Valley at 3000 

 feet on June 17th, but not seen again until I came down 

 to the low country at the end of July, where it was 

 common in the Bija Valley and in the open country about 

 Biisk in the first week of August. 



25. C. chrysothemc, Esp, 



The first generation of this species came out at Ongodai 

 on June 10th, and in the Tchuja Valley a week later, 

 flying rapidly over bare ground. The second generation, 

 which only differs by being on the average somewhat 

 larger, and not as in America by its deeper colour, was 

 abundant in the Kurai Steppe and Bashkaus Valley at 

 the end of July. A specimen from Krasnoyarsk in 

 Grum-Grshimailo's collection, the type of his (? MS.) var. 

 sihirica, is paler, and has more yellow at the apex of the 

 fore-wing, but one from Minusinsk in the Yenesei Valley 

 is like those I took ; on the average they are decidedly 

 larger and, I think, somewhat brighter than Austrian and 

 South Russian specimens, and resemble more the form 

 known in America as heewaydin, W. H. Edw. 



26. Colias aurora, Esp. 



I did not take this myself, but received several speci- 

 mens from Ongodai, which average somewhat smaller than 

 those from the Amur; all the females were of the white 

 form. It also occurs in the Yenesei Valley, and is recorded 

 by Ruckbeil from the South Altai. Those from the Kentei 

 Mountains are paler in tint and have narrower borders 

 than mine. 



