178 OUR SUMMER MIGRANTS. 



On the Senegal River and at Sierra Leone it 

 may be seen all the year round, but is less 

 numerous there from June to September/ On 

 the West Coast of Africa the Swallow appears 

 to travel as far south as the island of St. Thomas 

 on the equator, where Mr. Yarrell states it has 

 been met with in January and February. 



In Tangier and Eastern Morocco Mr. 

 Tyrwhitt Drake says the Swallow is found 

 throughout the year, but the Martin and Sand 

 Martin, he believes, do not winter there. 

 (" Ibis," 1862, p. 425.) 



The Swallow has been noticed as plentiful at 

 Tripoli in the middleof March (Chambers, " Ibis," 

 1867, p. 99), and Mr. Osbert Salvin observed 

 it in Algeria, between Constantine and Batna, 

 where he found several nests among the rafters 

 of an open shed. According to the Rev. Canon 

 Tristram — than whom there is no better autho- 

 rity on the subject of North African and Pales- 

 tine birds — a few pairs of Swallows remain all 

 the winter in each oasis in North Africa, wher- 



' Tudbur)', " Mag. Nat. Hist." vol. v. p. 449. 



