250 BLACK-WINGED TERN. 



feathers, which are white, with dark cinereous tips ; 

 this latter colour extends, on the inner web, to ahout 

 one-third its length. The shafts of the quills on 

 -their inner surface are white, and the inner wehs 

 have on this side a white margin. The feet are 

 short and deep black. 



Total length, 15 inches; bill, gape, 2 T 4 ^; front, 

 l T 7 o ; wings, 10 J ; tail beyond, 1J; from the base, 

 7 ; tarsus, ^ ; middle toe and claw, 1^ ; hinder 

 ditto, T 4 ; inner ditto, T 8 Q. 



SENEGAL TERN. 



Sterna Senegal&nsis, SWAINS. 



Bill and feet red ; crown and nape black ; plumage above 

 light cinereous, beneath much paler ; chin, sides of the 

 head, and part of the throat, pure white ; wings ten inches, 

 rather longer than the tail. 



WERE it not that we possess no less than four dis- 

 tinct Terns, which might all pass for the S. hirundo 

 of authors, we should have been tempted to have 

 added this to the number ; the more so, because, at 

 this moment, we have not an authentic British spe- 

 cimen of that well known species to consult. Its 

 description, however, as given by M, M. Temminck 

 and Selby, although in general applicable to our 

 Senegal bird, is not strictly so, and we shall there- 



