S2S Mr. H. J. Elwes on the 



examples were already worn. It appears to be common 

 throughout Central Siberia, as Jacobson found it on the 

 Upper Yenesei, Leder on the Irkut, and Trybom on the 

 Lower Yenesei as far north as G4°. 



This species is probably more nearly allied to the North 

 American group, of which T. irns, Godart, is the best- 

 known representative, than to any Ejuropean species. This 

 group has been generically separated by Scudder under 

 the name Incisalia, 



it is quite distinct in my opinion from Thecla (SatsUma) 

 fcrrea from Japan, both by the pattern of the underside 

 and by the absence of the sexual patch on fore-wing of 

 male. 



34. Polyommatus virgaurem, L. 



I only found this in the prairie country near Biisk 

 on August 7th, when it was nearly over, but Jacobson 

 sent two pairs from Ongodai, which do not ditfer from 

 European specimens. I cannot see any difference between 

 the form from the Kentei Mountains named virgmcreola 

 by Staudinger, which would justify its separation, though 

 some specimens from that locality are almost without 

 white spots and darker on the hind-wing below. 



35. P. thersamon, Esp. 



Not taken by me, but in Staudinger's collection taken 

 by Kindermann. 



3G. P. hippothoe, L. 



The same remarks apply to this as to the last species. 



37. P. alciphron, Rott. 



This and the next species are both recorded by Lederer 

 as taken by Kindermann, but I can find specimens of 

 neither of them in Staudinger's collection, and neither 

 were taken by myself or Jacobson. 



38. P. dorilis, Hufn. 



39. P. disjMT, var. rutihts, Wernb. 



Recorded by Herr Tancre as having been taken by 

 Ruckbeil. Two pairs which he sent me from Kenderlik 

 are like Sarepta specimens in size, A form occurs in the 

 Kentei and Ghingan Mountains. 



