416 Mr. H. E. Drosscr's Notes on 



852. Sterna minuta, L. ; Scvcrtzoff, p. 70. 

 Horizontal range. Breeds in districts 111. and IV. 

 Vertical range. Breeds in districts 1 and 2. 



353. Hydrochelidon nigra (L.). 

 Hydrochelidon niger, Sevcrtzoff, p. 70. 

 Horizontal range. Breeds in districts I., II., and III. 

 Vertical range. Breeds in district 1. 



354. Hydrochelidon hybrida (Pall.). 

 Hydrochelidon leucopareius , Scvertzoff, p. 70. 

 Horizontal range. Breeds in district III. 

 Vertical range. Breeds in district 1. 



355. Cygnus olor (Gra.), Severtzoff, p. 70. 

 Horizontal range. Breeds in districts I. and III. 

 Vertical range. Breeds in districts 1 and 3. 



356. Cygnus musicus, Bechst. ; SevertzofF, p. 70. 

 Horizontal range. Occurs on passage and in winter in dis- 

 tricts I., II., III.; breeds early in district III. 



Vertical range. Occurs in winter and on passage in districts 

 1, 2, and 3. 



357. Cygnus altumi, Homeyer; Severtzoff, p. 70. 

 Horizontal range. Occurs on passage and in winter in dis- 

 tricts I., II., and III., everywhere rare. 



Vertical range. Occurs rarely on passage in district 1, and 

 rarely also in winter in districts 2 and 3. 



358. Anser middendorffi, Severtzoff, pp. 70, 149. 

 Horizontal range. Occurs on passage in districts I. and II., 



and winters in district III. 



Vertical range. Occurs on passage in districts 1, 2, and 3, 

 and winters in district 2. 



At page 149 Dr. SevertzofF writes as follows : — '^ Anser 

 middendorffi, nob. This Goose, which Middendorff discovered 

 in North-eastern Siberia, was described by him under the 

 name oi Anser grandis, Pall. ; but I have renamed it, as Mid- 

 dendorfF^s specimens agree precisely with mine from Tur- 

 Kcstan, and arc specifically distinct from Anser grandis of 



