16 BIRDS AND MAMMALS OF EAST SIBERIA [ Vol.'v ' 



Mr. Koren found this supposed American species to be an abun- 

 dant breeding bird along the entire Arctic coast of Siberia. The first 

 to arrive was on May 28, at Nijni Kolymsk. On June 17, at Nijni 

 Kolymsk, Mr. Keren's Russian assistant, who was a keen observer, 

 found a set of four nearly fresh eggs that he identified as of this 

 species. Unfortunately he took them without securing either par- 

 ent bird, and there must always attach some doubt to this clutch. 

 On July 5 four newly hatched chicks were found in wet grassy 

 tundra near the mouth of the River Medwjedschij. They were 

 accompanied by one parent bird only — the female. She and two 

 of the young were secured. Young birds able to fly were seen at 

 Chaun Bay, July 30, 1912. 



The Siberian specimens are exactly similar to American skins 

 in the same state of plumage, and it is probable that this species 

 has only recently extended its range westward. 



Pisobia temminckii (Leisler). 



Ten specimens, adults of both sexes and young, were taken at 

 Nijni Kolymsk, in the Island Delta of the Kolyma, at Chaun Bay 

 and Ajan Island, May 31 to July 23, 1912. Many clutches of eggs 

 were secured, varying from two to four to a clutch. The dates 

 were from June 19, when eggs were fresh, to June 27, when they 

 were found incubated. Newly hatched young were found on 

 July 8. All the nests were near the banks of rivers, and in every 

 case both parent birds were present with the nests and with the 

 newly hatched young. Flying young were seen at Chaun Bay, 

 July 30. 



Temminck's stint is an abundant breeder on the whole Arctic 

 coast of Siberia, and it extends its breeding range up the Kolyma 

 River at least as far as Nijni Kolymsk. The first birds of the 

 species seen in spring were at Nijni Kolymsk on May 31. 



We have carefully compared this series with many breeding 

 birds from Finmark, and also with western European and Chinese 

 specimens in winter plumage, and we can detect no differences 



