ERRATA. 



xi. p. 2, line 3. The specimen obtained at Suleskerry Lighthouse '. 

 been proved to be an example of P. borealis. 



xx. p. 3, line 32. The winter range does not extend south of Zanzibar. 

 xxi. p. 20, line 11. For " former " read "first-named." 

 xxi. p. 14, line 15. For " That bird " read " The Whitethroat." 



