Severtzoff’s ‘Fauna of Turkestan? 415 
343. Larus canus, L.; Severtzoff, p. 70. 
Horizontal range. Occurs on passage in district III. 
Vertical range. Occurs on passage in district 1. 
344. Larus cachinnans, Pall.; Severtzoff, p. 70. 
Horizontal range. Breeds in districts I., II., and III. 
Vertical range. Breeds in districts 1 and 3. 
345. ? Larus leucophasus, Licht. 
Larus argentatus , Severtzoff, p. 70. 
Horizontal range. Occurs on passage in district III. 
Vertical range. Occurs on passage in district 1. 
In a MS. note Dr. Severtzoff informs me that he believes 
this species to he true L. leucophaeus. 
346. Larus ichthyaetus, Pall. 
Gavia ichthyaetos , Severtzoff, p. 70. 
Horizontal range. Breeds in district III. 
Vertical range. Breeds in district 1. 
347. Larus ridibundus, L. 
Gavia ridibunda, Severtzoff, p. 70. 
Horizontal range. Breeds in all four districts. 
Vertical range. Breeds in districts 1 and 2. 
348. Larus minutus, Pall. 
Gavia minuta , Severtzoff, p. 70. 
Horizontal range. Occurs in summer in district III. 
Vertical range . Occurs in summer and possibly nests in 
district 1. 
349. Sterna caspia, Pall.; Severtzoff, p. 70. 
Horizontal range. Breeds in districts I., II., and III. 
Vertical range . Breeds in districts 1 and 2. 
350. Sterna anglica, Mont.; Severtzoff, p. 70. 
Horizontal range. Breeds in all four districts. 
Vertical range. Breeds in districts 1, 2, and 3. 
351. Sterna fluviatilis, Naum. 
Sterna hirundo , Severtzoff, p. 70. 
Horizontal and Vertical ranges. As in the preceding species, 
except that in the latter it does not breed in district 3. 
