16 JOTTINGS ABOUT BIRDS. 



waters are as yet very imperfectly known, and it 

 may ultimately be discovered that both species 

 breed on the mainland of the Algerian coast. 



30. THE BLACK TERN Sterna nigra, Linnaeus, is 

 a resident in Algeria and breeds in various marshes ; 

 it is, however, more abundant in winter than in 

 summer. According to Canon Tristram, this and 

 the following species of Tern marked with an 

 asterisk are only found in the Western Sahara, 

 chiefly on the great lakes of Zahrez, and never 

 further south. 



31. * THE WHITE-WINGED BLACK TERN Sterna 

 leucoptera, Meisner and Schinz, is said to breed 

 in Algeria, but particulars of its distribution are 

 wanting. 



32. * THE WHISKERED TERN Sterna hybrida, 

 Pallas, breeds in moderate numbers in Algeria. 

 Canon Tristram assured me that it breeds in May 

 on the various fresh-water lakes. 



33. * THE GULL-BILLED TERN Sterna anglica, 

 Montagu, breeds sparingly in Algeria, but becomes 

 more abundant in winter. Taczanowski states that 

 it breeds in small numbers on the lakes near 

 Constantine, probably those of Tinsilt and Mzouri. 

 Canon Tristram met with it in winter at the Zahrez 

 Lakes. 



