THE SPRING MIGRATION OF BIRDS. 215 



(Tringa temjuiiichi) arrived on the 6th. The 

 Golden Plover [Cliaradrius pluvalis) arrived on the 

 7th, and the Ringed Plover (^Charadrius kiaticida) 

 with the Terek Sandpiper (^Totanus terekia) on the 

 8th. The l^\i^ [Tot cuius pugnax) and the Dotterel 

 [Ckaradriiis moriiiellus) arrived on the 9th; the 

 Great Snipe {Scolojjax major) on the nth ; and the 

 Common Sandpiper (Totcuius kijpoleucus) on the 

 1 2th. On the 15th, the Green Sandpiper [Totanus 

 ochropus), the Red-necked Phalarope {Plialaropus 

 hi/perborens), and a solitary Curlew Sandpiper (Tringa 

 subarguata) arrived. Although migration continued 

 until the end of the month, during which many- 

 new species of Passerine birds arrived, I did not 

 add a new species of Charadriinae bird to my list 

 until we reached the tundras beyond the limit of 

 forest growth." 



It would appear, however, that at least one-third of 

 these migrants visiting the North Russian tundras 

 in summer, vary their route somewhat, and do 

 not pass through Ust Zylma, coming by way of 

 the Baltic and White Seas, and thence along the 

 coast to the Petchora delta, leaving the great river at 

 its junction with the Ussa, instead of making the 

 long detour south-west which the course of the 

 Petchora here follows, and pushing along the valley 

 of the tributary to the tundras further north; per- 

 haps even passing north direct, and leaving the river 

 system entirely. Seven species of Waders apparently 

 took one or the other of these alternative routes ; two 

 Passeres and three Gulls (Larid.e) did hkewise. 



