246 ON THE MIGRATION OF BIRDS 



and pass through Ust Zylma, whilst the later breeders on the tundra are 

 not seen there at all. The following birds are all summer migrants to the 

 tundra, but were not seen passing through Ust Zylma during migration : — 



Yellow-headed Wagtail {M. citreola). Dunlin. 



Arctic Tern. Richardson^s Skua. 



Petchora Pipit {Anthus seebohmi, Dress.). Dotterel. 



Red-necked Phalarope. Sanderling. 



Long-tailed Duck. Curlew Sandpiper. 



Buifon's Skua. Little Stint. 

 Grey Plover. 



Most of these are very late-breeding birds. We found eggs of the 

 Little Stint 27th of July, Long- tailed Duck 23rd of July, Richardson's 

 Skua and Grey Plover 12th of July. That many of these birds do migrate 

 along the valley of the Volga the following remarks will prove. They are 

 translated from a work published in Russian, at Kasan in 1871, entitled 

 ' Descriptive Catalogue of the High School of the Imperial University at 

 Kasan, edited by Messrs. Kovalevski, Levakovski, Golovinski, and 

 BoGDANOFF.' The information is extracted from vol. i., part 1, Chapters 

 2, 3, and 4, which are headed " Materials for making a biography of the 

 birds of the Volga." 



" Little and Temminck's Stints are seen in flocks during the first fort- 

 night in May on the Volga from Ssimbirsk to Kasan, and on the Kama as 

 far as Ufa. In summer they are not seen, but are found in the middle of 

 August again at Ssimbirsk. 



" Curlew Sandpipers are seen at Kasan in spring and autumn only, both 

 on the Volga and the Kama. 



" Sanderlings are found in autumn at Kasan, and have been seen in 

 spring on the Sarpa. 



" Grey Plovers are observed in small flocks in May and September near 

 Kasan ; but not every year. 



"Yellow-headed Wagtails arrive at Kasan, whilst the common species 



