272 THE BIEDS OF MONGOLIA ETC. 



119. Erythrosterna leucura, Gmel. 



This representative of the European E. parva is tolerably common in 

 the wooded and bush-covered mountains of S.E. Mongolia. We found it in 

 the valley of the Yellow River, migrating about the middle of May ; but in 

 Kan-su we did not find either the present or the following species. 



120. Hemichelidon sibirica, Gmel. 



Hemichelidon fuliginosa, Hodgs.; Henderson & Hume, Lahore to Yarkand, pi. iv. 



Is of occasional occurrence in Mongoha, and most likely breeds in 

 similar localities as Erythrosterna leucura. During the autumnal migration 

 we once observed it in Northern Ala-shan. 



121. Ampelis garrula, L. Sverestel hohlushka. 



Each spring we observed it in S.E. Mongoha. On the 21st of March, 

 1871, I met with a flock at Lake Dalai-nor; and in the following year my 

 companion came across some of these birds in the Suma-had mountains. 

 Both times the birds were doubtless migrating northwards. In Ussuri 

 country they are tolerably common in autumn, especially on the shores of 

 the Japanese Sea ; but at Lake Ilanka we only once noticed a migrating 

 flock. 



122. CoLLYRio sphenocercus, Cab. 



This species, so closely aUied to C. homeyeri, differs from it, as has been 

 stated by Cabanis (Journ. f. Orn. xxi. 1873, p. 76), in having the longer and 

 stronQ:ly graduated tail and the outer tail-feathers with a white shaft ; but 

 the rump and upper tail-coverts are of the same ashy grey colour as the 

 back. In all other respects the two agree with each other ; and in the same 

 way as C. homeyeri is represented in Europe and Western Asia by the form 

 C, excuhltor, it is represented in the east of Asia by the present species. 



